this is bbc news, the headlines at 11. home secretary amber rudd says the government "will not resile from taking action" against technology firms if they host material that could aid terrorists. we wa nt we want them to recognise that they have a responsibility to engage with government, with law enforcement agencies when there is a terrorist situation. scotland yard says the westminster attacker khalid masood acted alone and his motive may never be known. detectives confirmed the attack lasted just 82 seconds. the family of murdered pc keith palmer has thanked those who fought to save his life and said they were grateful he was not alone. more than 30 people have been injured, two seriously, after a suspected gas explosion on merseyside. the pentagon investigate a us—led coalition air strike in the iraqi city of mosul, where dozens of civilians were reportedly killed. also in the next hour, the beginning of the end to mercedes‘ formula one dominance? ferrari's sebastian vettel pips

lewis hamilton to the chequered flag in the first race of the season in melbourne, his first win since 2015. and coming up in half an hour, we'll have dateline london. good morning and welcome to bbc news. police say they might never find out why khalid masood killed four people near the houses of parliament on wednesday. scotland yard now say they believe he was acting alone and that the attack was over within 82 seconds. meanwhile, the home secretary, amber rudd, has said she is ready to take

action against internet companies if they will not work with security services during terrorism investigations. 82 seconds, that's all it took. in that time, khalid masood caused the deaths of three people on westminster bridge, and injured many more. he crashed his car into the railings, ran through a gate at the houses of parliament, and stabbed pc keith palmer to death. last night, his family paid tribute to his selfless bravery, saying... police believe that masood carried out the terror attack on his own but are trying to establish if he was encouraged or directed by others. questions remain unanswered about his route to radicalisation. he was a violent criminal — before converting to islam more than a decade ago. since wednesday, 11 people have been arrested. all have now been released,

except for a 58—year—old manfrom birmingham. detained under the terrorism act, he can be held without charge for 14 days. members of the public have come to the scene of wednesday's attack to pay their respects to the four people who lost their lives, also to remember the many who were injured and those who remain in hospital. alexandra mackenzie, bbc news. well, the investigation continues as the home secretary issues a fresh call for a crackdown by social—media companies against online extremism and radicalisation. earlier, i spoke to our correspondent nick beake at westminster, who gave us the latest. this is where tributes of the attack are continuing to grow. lots of messages have been left this morning. police officers, londoners, tourists, taking time to stand and think and contemplate what happens last wednesday. the events that we saw have prompted the home secretary to renew her fire

when it comes to the big social—media companies. we have seen criticism of the likes of google and facebook before. but the home secretary was singling out a few smaller companies, her concern is on two levels. first of all, platforms which are encrypted, so people can send messages which police and security services aren't able to intercept. but also that they are, in effect, a platform for hatred and poisonous ideology to be shared. this is what the home secretary, amber rudd, said on the andrew marr programme this morning. it is completely unacceptable. there should be no place for terrorists to hide. we need to make sure that organisations like whatsapp do not provide a secret place for terrorists to communicate with each other. it used to be that people would steam open envelopes orjust listen in on phones when they wanted to find out what people were doing — legally.

but in this situation we need to make sure that our intelligence services have the ability to get into situations like encrypted whatsapp. this is the same situation that is going on between apple and the fbi in washington, where tim cook of apple has so far said they are not going to allow the american authorities to open a back door into their apps, and yet if they don't, this end—to—end encryption continues. do they have to take on the big internet companies and force them to open their devices? if i was talking to tim cook, i would say this is something completely different. we do want them to recognise they have a responsibility to engage with government, to engage with law enforcement agencies when there is a terrorist situation. we would do it all through carefully thought through and legal arrangements. they cannot get away with saying, "we are a different situation" — they are not. tim cook of apple says it would be

wrong for the government to force us to open a back door into our products. and yet without that, you can't find out what you need to find out. i would ask him to look at other ways of helping us. it is not necessarily apple itself, it is sometimes other situations. which is why i am calling in a lot of the organisations relevant to that this week to ask them to work with us to deliver the answer. it is not about them standing back from us, this is a national problem. who are you calling in? a long list? i would rather not be going to who we are calling in, it is a long list, but it is also the smaller companies as well. to make sure there is no hiding place for terrorist. i want to make sure everybody takes responsibility for this. this debate is central to what happened here. we know that khalid masood, the man who carried out the attack, checked whatsapp on his phone

on wednesday just three minutes before he launched that deadly assault. it was at 2:37pm, just before he drove across westminster bridge carrying out the attack, and stabbed pc keith palmer in the grounds of westminster. whatsapp is one of those companies which the home secretary is keen to speak to, she is having a meeting with a number of social—media providers, hoping to build bridges and work together with them. we now know from the police that they in terror attack lasted only 82 seconds, that is quite extraordinary, isn't it? yes, less than a minute and a half. it could have taken place over a much longer time frame, were it not for the fact that a close protection officer who happen to have a sidearm was able to kill the attacker. it may well have been that the terrible events

would have played out even longer, but 82 seconds was all that it took for this deadly assault to take place. the police have been working to establish the motive for this, but it was very telling overnight but we heard from a senior counter—terrorism officers saying we may never know why this man carried out this attack. the police insist he was probably inspired by international terrorism, but they have arrested 11 people. one man remains in custody. but it is quite interesting, the police have been quite honest in saying it may be the case that in terms of motive, that is something that this man may have gone to his grave knowing, and it may be impossible to find out why he carried this out. we will shortly be talking to the director of europol, rob wainwright, with his views on that story. let me bring you up to date with a

story we brought you a little earlier they should gain in our high though, in cincinnati. police say 15 people were shot and one killed when gunfire erupted at the cincinnati nightclub. these are the live pictures that you are looking at, clearly the early hours of the morning still there in ohio. we have senior police saying that the authorities are not sure what prompted the shooting at the cameo nightclub, but captainjim williams says the crowd is often very young there on saturday nights, that they have had problems in the past, but this is the worst by far. more than 30 people have been hurt, two of them seriously, after a suspected gas explosion in merseyside. a dance centre for children was destroyed and customers at a chinese restaurant were caught in the blast near birkenhead. andy gill sent this report.

the scale of the devastation shows just how powerful the explosion was. one building housing three businesses totally destroyed. this is what it looked like before last night. the blast was heard up to six miles away. an almighty bang, but as well as the bang there was pressure as well, i felt a lot of pressure, my window was shut, i thought initially it was in the house, i've ran around like a maniac for a minute, looking round obviously to see if my house is still in tact and stuff like that. the sound of the building blowing up was captured by a car's dashboard camera. what was that?! two people were taken to a trauma unit in liverpool with serious injuries. 32 others were treated at hospitals in wirral and chester.

there's a multitude of injuries that have happened, but the two patients that have gone through to the major trauma unit at aintree have significant injuries. this has clearly been a huge explosion, powerful enough not only to bring down the main building and scatter debris for hundreds of yards, but also to punch huge holes in the walls of nearby buildings. the emergency services won't speculate on the cause of the blast, but a number of local people said they smelt gas yesterday and on friday. national grid engineers are on the scene. this incident is likely to be protracted, this is likely to last several days. very significant damage, as you can tell. so it will be some time before people will be allowed back into their homes. some people whose homes had to be evacuated spent the night in a local church. nearby roads are likely to be closed for some time.

andy gill, bbc news, wirral. adam dingwall was driving in the area when the explosion happened, and a little earlier he told me what he saw. we were driving through when we heard the explosion. it turns out we were probably about 500 yards away. at first, i had no idea what it was. but i saw someone running from that direction, saying that there has been an explosion, and one of the buildings has been destroyed. so we headed over that way because i thought, well, i am a trained first aider, so i may be able to do something to help. as we pulled up, we saw bricks and glass and rubble everywhere. so i went running over to see if i could do anything, and a police officer stopped me. i presume he was off duty, he certainly was not in uniform,

and he asked me to run into some of the houses that were nearby and had been hit, to see if there was anybody inside. what did you find? thankfully, i did not find any people, there was nobody in them. but all the houses, the front doors were completely blown in. and inside each of the houses, it was just an absolute mess, lots of rubble, glass everywhere. i did not release see a lot, because it was dark, and i did not want to turn any lights on, what with there being the really strong smell of gas. but looking round, it was just an absolute mess. as we are talking to you, we are looking at pictures of the scene, and it is a scene of utter devastation, the explosion was clearly

extremely powerful. yeah, definitely. the rubble and the brick had really travelled a fair distance, and the houses opposite that i was in, all the windows were blown in and the doors have come off. you sound slightly shaken. i am, to be honest. it was quite a nervy experience, the adrenaline got pumping at the time and ijust ran in to see what i could do. let's go back to our main story, the terror attack in westminster. joining me now is rob wainwright, who is the director of europol, joining us from the hague, thank you very much forjoining bbc news this morning. tell me about europol‘s involvement in the police

investigation into what happened into what happened on wednesday. well, we are actively supporting that investigation, reeta, the details of which i cannot share today, but to give you some context, it is one of about 80 counterterrorism cases across europe that europol has supported this year, sharing thousands of intelligence messages across the counterterrorist community in europe, using our means to monitor, report on the close of terrorist financing, terrorist use of firearms, and also to monitor the way in which the internet, of course, is being used to spread this ugly course, is being used to spread this da. course, is being used to spread this ugly propaganda. 80 cases across europe? i mean, that is a lot of cases, isn't it? what are the difficulties facing police forces as they struggle to deal with this threat? well, i think the scale is a real challenge for us, we have thousands of radicalised individuals

working across a very dispersed network, some of which, like we saw in the attack on the berlin christmas market faster, the attacking nice last summer in france, and what appear to be the case in westminster, these people are on the fringes of that radicalised immunity. not much intelligence to indicate that they are about to carry out an attack like this, and that makes the job of the security services and the police are exceptionally difficult to get right. having said that, you know, i think we are seeing almost all of the tax is now being stock, this was the tax is now being stock, this was the 14th attempt in the last three oi’ the 14th attempt in the last three orfour the 14th attempt in the last three or four years, the 14th attempt in the last three orfouryears, and the 14th attempt in the last three or four years, and the the 14th attempt in the last three orfour years, and the only one, until now, to get through, but it is indeed a highly challenging scene thatis indeed a highly challenging scene that is faced by the police. you referred a little bit earlier to social media, and you will be aware that the british home secretary, amber rudd, has called on technology firms such as whatsapp to help security services, to allow them

access to encrypted information in cases like these. what is your reaction to that? well, i think it isa reaction to that? well, i think it is a reasonable call by the home secretary, what seeing crossed the hundreds of cases that europol has been supporting is that encryption is becoming more and more of a feature of those cases, more and more of a means by which terrorists are attempting to communicate in a secure way. and a really significant challenge for the police to get beyond that. at the heart of it, reeta, is this a stark inconsistency that the police have the means by which to carry out lawful interception of telephone calls, but not a interception of telephone calls, but nota similar interception of telephone calls, but not a similar means that those communications if they appear through a social media platform, and that doesn't seem right. there is an inconsistency that has not yet been fixed by the right legislation or the right kind of interaction between government and technology partners. 0k, we will leave at there, rob wainwright, thank you very much forjoining us.

yesterday the ukip mp, douglas ca rswell, yesterday the ukip mp, douglas carswell, said he was leaving the party in the knowledge that the party in the knowledge that the party goal had been achieved. former leader nigel farage tweeted at the time that he had jumped before he was pushed. well, the former ukip leader, mr farage, joins us now from oui’ leader, mr farage, joins us now from our studio leader, mr farage, joins us now from ourstudio in leader, mr farage, joins us now from our studio in millbank, thank you for joining our studio in millbank, thank you forjoining us, so i suppose it is well—known that there is little love lost between you and douglas ca rswell, lost between you and douglas carswell, but the fact remains that ukip has now lost its only mp, that can't be a reason for rejoicing, can it? oh, it is, absolutely. this guy has been working against the party consistently for the last two years. he never supported, from day one, many of the key planks the party believes in, he was sincere and

brexit but nothing else, he caused endless division, and i am very pleased he is gone, particularly pleased he is gone, particularly pleased for paul nuttall, who has now got a chance to lead a unified party. douglas carswell there, that was always going to be impossible. but douglas carswell was elected on a ukip ticket, something which, respectfully, you didn't manage to do, neither did the present leader of the party. just run but this - cla cton of the party. just run but this - clacton is demographically the number—one eurosceptics sit in this country, and i would say this, a lot of people who voted him into parliament did not vote just because of him, they voted ukip, he has given up the label on which he was elected, and this is the man who led the charge in parliament for real recall, to give people a mechanism by which at 20% of the constituency, if they voted to have a by—election, they should legally be able to have one. so what we will do is take him at his word, and we will now write

to every house in clacton and asked them, do you want a by—election or not? if more than 20% say they do, we will find out just not? if more than 20% say they do, we will find outjust how honourable mr ca rswell we will find outjust how honourable mr carswell is. but technically he doesn't have to have a by—election, he maintains because he is not moving party, he doesn't have to have one. of course he does, he was voted in as a ukip candidate, and it isa voted in as a ukip candidate, and it is a constituency in which ukip is very, very strong. i could be wrong, but i suspect there will be a lot of very angry ukip voters in clacton this morning. what you make of this central point that ukip has achieved what it set out to jean? brexit central point that ukip has achieved what it set out tojean? brexit is going to happen, it is happening this week, that is why he is going, job done very successfully. we have won the war, we now have to win the peace, and i am very concerned, i see the government backtracking on taking back territorial fishing waters, i hear from taking back territorial fishing waters, i hearfrom amber rudd that she once us to stay part of the european arrest warrant, she wants

european arrest warrant, she wants european court of justice european arrest warrant, she wants european court ofjustice in luxembourg still to have supremacy in some areas. this is far from over. do you fear that, once again, ukip is in the headlines because of internal infighting, rather than because of what you stand for? virtually every bad story about ukip that has emerged for the last two and a half years has come as a result of splits with douglas ca rswell, a result of splits with douglas carswell, a tiny handful of people that were his key supporters, and i think, actually, in terms of splits, i think today is a very good unifying day for the party, i am hearing that already. so a prediction from nigel farage that it will be harmony from now on within ukip? well, i don't think there will be big ideological divides, everyone in the senior positions agrees with the manifesto, understands how important immigration is as an issue to britain voters, and a0 and a half yea rs to britain voters, and a0 and a half years we had douglas carswell trying to get rid of that policy — has ended.

-- let's take a look at the sport now withjohn -- let's take a look at the sport now with john watson. ferrari's sebastian vettel won the first race of the formula one season, as lewis hamilton in his mercedes were left to rue a badly timed pit stop in melbourne. signs that the forthcoming championship may not be the procession for mercedes that it has been in recent years. nick parrott reports. the sebastian vettel victory finger had not been seen for 18 months — until today. that's because mercedes have dominated formula one for the last three years, starting from pole in melbourne, lewis hamilton was the favourite to win the race, and when he emerged from the first corner in the lead, many might have thought all bets were off. new rules have been brought in to make the cars faster, and the sport more exciting, but this race was won, thanks to a tactical error. with sebastian vettel pressuring hamilton, mercedes blinked first, bringing him in for fresh tyres. he came out in fifth and got stuck in traffic.

we need to get past verstappen. i don't know how you expect me to do that right now! sebastian vettel timed his stop to perfection. he came out in front of hamilton, and mercedes knew their challenge was over. the german cruised to the chequered flag, winning by more than nine seconds. the last time he won the opening race was in 2011 when he went on to become champion. hamilton has been warned. at the start, i wasn't entirely happy, i think i was tommys, too nervous, i had a bit of wheel slip, lewis was better, then i had to take ca re of lewis was better, then i had to take care of valtteri into toe one. but then i was really trying to keep the pressure on to make sure that they get the message, we are here to fight, and i got a bit lucky when lewis came out in traffic. it had beena lewis came out in traffic. it had been a great weekend for the team, but struggled with the tyres towards the end, i have to stop a lot

earlier, i had run out of grip. i was behind one of the rebels, sometimes the way it goes. but overall, great race, good points for the team, and thank you to this crowd, thank you for coming out, such a great place for us to be. england, scotland and northern ireland are all in action for world cup qualification tonight. gareth southgate says his team must be flexible enough to adapt to different opponents. he says the match against lithuania will be all about that. we are a hungry, young team, with a lot of potential. and we wa nt team, with a lot of potential. and we want to go out and play an exciting brand of football. we work ha rd exciting brand of football. we work hard for each other, and the scoreline takes care of itself if you do all those things correctly. so we are always focusing on performance, and the result will follow. argue blue more at stake for

scotland, in the same group as england, they are fifth. —— arguably. if they don't beat slovenia, their hopes of qualifying will look very slim indeed. sometimes it is easy for a manager to say, this is what we have got to do, sometimes we are in a position where a draw is enough, but we have to win. you don't have to win in the first five or ten minutes, you have to be, you never know, in big games, when your opportunity comes along. northern ireland are well placed heading into their match with norway, second in the group, five points behind germany, on course to clinch a play—off place. points behind germany, on course to clinch a play-off place. we have the opportunity put seven points between ourselves in norway, the opportunity to get to ten points, and once you get to that stage, you start to believe it is possible to put yourselves in a position to qualify, and that is certainly the experience of qualifying for france, we have been through that, and those experiences, we know what is required to get there now. anthony crolla was outclassed in his bid to regain

the wba lightweight title in manchester last night. he lost his rematch withjorge linares on points. in front of a home crowd, he went down in the seventh round after being caught with an uppercut. and although he responded well, linares retained the belt on a unanimous decision. england's ross fisher is out of the world golf championship match play in texas. he lost to japan's hideto tanihara in the quarterfinals, but he did leave with a decent consolation prize — his win over bubba watson in the previous round took fisher into the world's top 50 and earned him a place in the masters next month. scotland beat sweden to take bronze at the world women's curling championship in beijing. skip eve muirhead and her team had lost to the swedes in a play—off yesterday, but they turned the tables, winning 6—a in the bronze—medal match. canada beat russia to take the gold. that's all the sport for now. the former x—factor judge cheryl

has announced that she's given birth to herfirst child, a baby boy. the singer posted a photo of her pop—star partner liam payne, from the band one direction, cradling the newborn on social media. in the post, cheryl said she gave birth on wednesday, but the couple have yet to decide on a name for their son. let's ta ke let's take a look at what the weather is doing with chris fawkes. hi, reeta, we could get used to this, plenty of sunshine around, and thatis this, plenty of sunshine around, and that is the way it will stay for the next day or so. beautiful sunny skies at the moment in the outer hebrides, the sea is as flat as a milk bond, glorious picture from the weather watchers. —— milk pond. it will be another warm on, temperatures potentially reaching 19 degrees across northern scotland, so it could yet be the warmest day of the year so far, it will come down

to fractions of a degree. we will keep the clear weather overnight, then low cloud drifting, cold for then low cloud drifting, cold for the north of the country, a touch of frost for some areas, then fine conditions for the most part, early morning low cloud burning away, sunny skies coming through during the rest of the afternoon. with lighter winds, we are seeing those from a south—easterly direction, we should see things getting warm across south—east england, highs of i7 across south—east england, highs of 17 or 18 degrees, higher temperatures across the western side of the uk. that is your latest weather. hello, this is bbc news. the headlines: the home secretary says there must be no place for terrorists to hide, and called on social media providers to end the encryption of messaging services. her comments come after it was revealed khalid masood used the whatsapp messaging service moments before launching his attack

in westminster last week. scotland yard has confirmed the attack carried out by masood took just 82 seconds. detectives have revealed his motive may never be known. they believe he acted alone, despite one of the 11 people arrested in connection with the attack remaining in custody. the family of pc keith palmer, who was killed in the attack, have paid tribute to him and thanked those who helped him after he was stabbed. they said they wanted to "express their gratitude" to the people who were with him in his last moments. more than 30 people have been injured, two seriously, after a suspected gas explosion in merseyside. several buildings collapsed and others were damaged in the incident and homes nearby have been evacuated. it could be several days before owners can return. one person has been killed and ia others hurt in a shooting at a nightclub in the us state of ohio. hundreds of people were in the cameo nightclub in cincinnati when two people started shooting.

the pentagon has admitted us—led coalition aircraft did strike an area in the iraqi city of mosul where dozens of civilians are said to have been killed. the un says there's growing concern about the fate of civilians in the city, where government forces are trying to drive out so called islamic state. now on bbc news, dateline london. hello, and welcome to dateline london. donald trump cannot manage to persuade enough republicans