this is bbc news. i'm kasia madera with the latest headlines for viewers in the uk and around the world. a police officer dies after being rammed by a car outside the us capitol building in washington. another officer is being treated in hospital. the suspect, who emerged from the car with a knife and ran at officers, was shot and died in hospital. the suspect did start lunging toward us capitol police officers, at which time us capitol police officers fired upon the suspect. the us national guard has been deployed in the area. the us capitol was put on lockdown. the top homicide investigator for the us city of minneapolis gives evidence on day five of the george floyd murder trial.

dozens of british mps call on the government to abandon any idea of vaccine passports to help reopen the economy. hello, and welcome. a police officer has died and another has been hospitalised after an attack on the us capitol. the attacker, 25—year—old noah greene from the us state of indiana, rammed a car into a barricade and then emerged brandishing a knife. he was then shot dead by police. president biden said he was heartbroken over the death of the officer, william evans, who had served for 18 years. this is the second time the capitol has been targeted this year, after supporters of donald trump stormed the building in january. here's our north america

editorjon sopel. sirens wail. we've been here before. lunchtime on a cold easter day, and another emergency at the capitol. a man in a blue car rams two us capitol police officers near a barrier. as he gets out of his vehicle, knife in hand, he's shot and has now died. immediately, congress goes into lockdown. a helicopter�*s summoned and lands in front of the capitol building. and the national guard, which has been on duty since the capitol riots of january the 6th, is mobilised. another terrifying moment for those who work in the congressional offices. at a hastily organised news conference, confirmation that one of the police officers has died as well. and it is with a very, very heavy heart that i announce one of our officers has succumbed to his injuries. but the assailant doesn't seem to have been on anyone�*s radar

screens, and police are saying there doesn't seem to be an ongoing threat. it does not appear that he is known to the capitol police or the metropolitan police department at this time. sir? is this a terrorism—related incident? _ it does not appear to be terrorism—related, but obviously we'll continue to investigate to see if there's some type of nexus along those lines. it was only a few days ago that some of the intense security around the capitol, following january's shocking assault, was eased. just a week ago, the driver wouldn't have been able to get as close to the building as he did. what's happened today may be totally unrelated to the events of january the 6th, but there's a terrible sense of deja vu, a further heightening of the feeling of vulnerability. and once again, above america's august and imposing capitol building, flags have been ordered to fly at half—staff. jon sopel, bbc news, at the capitol.

i have been speaking to barbara plett usher, our us state department correspondent, who has been monitoring events from outside the us capitol. she now gives us a sense of how the country has been reacting to the incident. over the past weeks, i think the city had begun to relax a bit more because since january sixth, there'd been a massive security increase around the capitol building, as you know. there had been some warnings about possible attacks, but nothing had happened. and now something has, so people are on edge again and nervous about what to expect. now, this is nothing like on the scale, of course, of what happened onjanuary 6th, which was a mob storming the capitol building with arms, hunting down congresspeople, attacking police officers. this seems to be a one—man attack. at this point, it appears that he acted alone. it's also not at all clear that he might be, you know, connected to some kind

of political or other cause. the officers who spoke to us earlier said that they were not calling it a terrorist attack, and this man has not appeared on law enforcement radar before. he's not known to police. so it's not clear what his motivation was. obviously, that will be a big part of the investigation. but, yes, it has rattled people to come three months months afterjanuary 6th, and some of the congressional aides that the bbc spoke to said it did make them nervous, especially with the security around, that another attack could happen. and the president has issued a statement saying that he was heartbroken at today's event. that's right. he said he was heartbroken. he offered heartfelt condolences to the family of the officer who was killed. william "billy" evans was his name. he was an 18—year veteran of the capitol police force. this is the second officer in the capitol police force to die in the line of duty this year, so that force has

been hit really hard. the president also said that he was following the investigation closely. he expressed gratitude to the police. and so he has spoken out in response and it says that the flag at the white house will be flown at half—mast. nancy pelosi, the house speaker, also said the flag at the capitol building would be flown at half—mast as well. a minneapolis homicide investigator has said police officer derek chauvin used "totally unnecessary" deadly force when kneeling on george floyd's neck during an arrest last may. he was giving evidence on day five of the trial of mr chauvin, the white former officer accused of killing mr floyd. here's a bit of what lt richard zimmerman had to say responding to the prosecution. what is your view of that use of force during that time period?

totally unnecessary. what do you mean? well, first of all, pulling him down to the ground face down and putting your knee on a neck for that amount of time is just uncalled for. i saw no reason why the officers felt they were in danger, if that's what they felt. and that's what they would have to feel to be able to use that kind of force. our correspondent lebo diseko is in minneapolis and has been watching the trial. today has been very much| about the police response. lt zimmerman, one of- the longest—serving and most respected officers here in minneapolis, telling| the court that in his 35 years on this force in minneapolis, he has never been trained l to kneel on someone's neck

and that is because it. constitutes deadly force. also talking about the fact that once somebody is in. handcuffs, they no longer constitute the same - level of threat. and really saying that as a police officer, i you have a duty of care - to somebody once they are handcuffed, that their safety is your responsibility. - let's get some of the day's other news. officials from tehran and washington will travel to vienna next week as part of efforts with other world powers to revive the 2015 iranian nuclear deal. the us and iran are not expected to hold direct talks, but russia has said the talks are on the right track. the iran nuclear deal was scrapped by president trump's administration after he accused tehran of breaking the conditions. the japanese scientist isamu akasaki, who won a nobel prize for developing energy—efficient led lighting, has died at the age of 92.

professor akasaki was jointly awarded the prize for physics in 2014 along with two other scientists. the nobeljury described their invention of the blue light—emitting diode as revolutionary. here in the uk, more than 70 mps, including 41 conservatives, have condemned the idea of vaccine passports for entry into public venues or workplaces in england. the policy, which would mean people showing a certificate confirming their covid status, has been described as "divisive" and "discriminatory". the government says no final decision has yet been made. our political correspondent nick eardley has more. a small taste of freedom — many people have been making the most of being allowed to meet friends outdoors again. but when might life feel more normal, with busy pubs and restaurants, stadiums and theatres? it's one of the questions the government is considering,

and whether proof you've had a vaccine or a negative test could reduce, maybe even remove, the need for social distancing. i think it's a good idea, but with all things, it needs testing. ijust don't... i don't know. i feel like it would create a division in society, personally. i would love to, because, well, i work in a pub. - so, will you need a certificate to get in here in the future? some sort of vaccine passport does look likely for international travel, but it's more controversial at home. a group of 70 mps, including a former labour and conservative leader, have spoken out today, writing... i'm not convinced that vaccine passports for use within the uk is proportionate to the risk.

it would be divisive, effectively creating an underclass of people who are not vaccinated, many of whom will not be vaccinated for medical reasons. the government is hoping to allow more people back into theatres, like this one in wolverhampton. this is not about a vaccine passport, it is about looking at ways of proving that you're covid—secure, whether you've had a test or had the vaccine. clearly no decisions have been made, because we have to weigh up different factors, the ethical considerations and so on, but it may be a way of ensuring that you can get more people back doing the things they love. there will be test events in the next few weeks, including at wembley for the fa cup. over the past year, we've gotten used to the government making massive decisions which have a big impact on individualfreedoms. but as society slowly opens up again, we face another big question — is it fair to ask people to prove they've been vaccinated or had a negative test to pop into the pub

or out for dinner? if they do happen, vaccine passports would be temporary, and they may not be used everywhere. some devolved governments are yet to be convinced they would be effective. there are also concerns about the practicalities. the additional burden - of the vaccine passport could really, really scupper things. it could make us actually feel that we're discriminating - against sections of - the population that haven't been offered a vaccinationj or are unable to have one, like pregnant women. there will also be more detail next week about a strategy for allowing holidays again, likely to involve a traffic light system based on how safe each country is. we've started getting some of our freedoms back, but there's a lot to consider in the coming weeks. nick eardley, bbc news. stay with us on bbc news. still to come... # we're riding down the road... using music to help children

born with autism overcome their speech disorders. we bring you a special report from ghana on world autism awareness day. music. the accident that happened here was of the sort that can, at worst, produce a meltdown. in this case, the precautions worked, but they didn't work quite well enough to prevent some old fears about the safety features of these stations from resurfacing. the republic of ireland has become the first country in the world to ban smoking in the workplace. from today, anyone lighting up in offices, businesses, pubs and restaurants will face a heavy fine. the president was on his way out of the washington hilton hotel where he had been addressing a trade union conference. the small crowd outside included his assailant.

it has become - a symbol of paris. 100 years ago, many parisians| wished it had never been built. the eiffel tower's birthday is- being marked by a re—enactment of the first ascent by gustave eiffeh — this is bbc news. the latest headlines — police guarding the capitol building in washington have shot and killed a man who drove his car into two police officers. one of the officers has also died. a minneapolis homicide investigator has said police officer derek chauvin used "totally unnecessary" deadly force when kneeling on george floyd's neck during an arrest last may. at least 50 people have been killed in a passenger train crash in taiwan. hundreds of others have been freed from the wreckage after being trapped for hours. our correspondent john sudworth reports. the train, travelling south from taiwan's capital and along

the island's mountainous east coast, was packed with people ahead of what is a long holiday weekend here. just as it was entering a tunnel, it's believed to have been derailed by a lorry that slipped onto the track from a nearby construction site. rescuers worked to free those trapped in carriages ripped apart by the impact. reports suggest that, with almost 500 people on board, many had been standing up. "the lorry slid off the road and crashed into the train," this worker says. "now all of the front carriages are damaged." some passengers were able to walk to safety. but the mangled wreckage blocking the inside of the tunnel meant others had to use the roof of the train to escape. ambulances ferried

dozens of injured people to local hospitals. "i was thrown to the floor. i hit my head, and it started bleeding," this woman says. "there was no space on the sides of the tunnel. we had to climb onto the carriage roof to get out." taiwan's premier, su tseng—chang, visited the scene, while family members gathered to identify the dead. and the scale of the loss of life left a profound sense of shock on a national holiday meant to be a time that brings loved ones together. the president, tsai ing—wen, described it as heartbreaking. the islands state—owned railway network, while reliable and efficient, has suffered a small number of fatal accidents over the years. this is being described as the worst in decades. john sudworth, bbc news, taipei.

the uk's medical regulator has said that out of 30 cases of rare blood clotting in people who've had the oxford/astrazeneca jab, seven people have died. that's out of a total of 18 million administered doses. the mhra said a review was ongoing, but that no link to the vaccine had been proven. it stated that people should continue to get their vaccines when invited to do so because the benefits outweigh any risks. our science correspondent rebecca morelle explains more. these clots are unusual in that they're associated with low platelet levels, and platelets are a type of blood cell that normally cause bleeding, not clotting, and these clots can affect the brain, too. so, what needs to be unpicked is whether these are happening naturally or whether they're a really rare reaction to the astrazeneca jab. the incidence is low, so 30 cases out of 18 million jobs. so that's about one event in every 600,000 astrazeneca vaccines. and the uk regulator said there have been two cases

of brain blood clots with the pfizer vaccine, too, but these don't have the low platelet counts associated with them, so they're slightly different. but these clots have caused some countries to actually restrict who they give the vaccine to. so, today, the netherlands has announced that it's not going to be giving the astrazeneca jab to people under the age of 60. germany are doing the same thing, too, but the uk is continuing with its vaccine roll—out. and the uk regulator stresses, along with the european medicines agency and the world health organization, that the benefits of having a vaccination and the protection that they offerfrom coronavirus far, far outweigh any potential risk. so, their message is, if you are offered the vaccination, to go ahead and take up that offer. india's cricket legend sachin tendulkar has been hospitalised after testing positive to coronavirus earlier this week. the former captain wrote on twitter that he had decided to go to a hospital in mumbai

"as a matter of abundant precaution under medical advice", and he added that he was hoping to be back home in a few days. our correspondent rajini vaidyanathan sent us this update from delhi. well, sachin tendulkar tested positive for coronavirus at the end of last week and was isolating at home. but now we know that he has moved to hospital. now, in his statement to his fans on twitter, he said this was out of an abundance of caution and that he hoped to be home in the next few days. so, no immediate cause for serious concern, but given that sachin tendulkar is a megastar in this part of the world with hundreds of millions of fans, there are many, many people who will be watching his condition very closely. now, this all comes as india itself is seeing a huge spike in coronavirus cases. in the last 2a hours, more than 82,000 coronavirus

cases reported and more than 430 deaths. a russian medical team has successfully completed open heart surgery on a patient as firefighters battled to control a serious blaze at a hospital in the far—eastern city of blagoveshchensk. the leader of the heart unit said his team had to do everything to save their patient. gareth barlow reports. firefighters rushed in. as smoke billowed out of the building, firefighters rushed in. emergency services scrambled to evacuate more than 120 patients being treated at the tsarist—era hospital. amid the chaos, one team of medics apparently carried on. eight doctors and nurses performed a two—hour open heart operation. with electricity cut by the fire, an emergency power cable was fed into the building to keep vital life—support systems operational.

translation: when smoke came in, we installed special— electric fire brigade fans to evacuate the smoke from the first floor and from the operation room. the operation was a success and the patient successfully transferred to another unit. no one was injured by the fire. however, the impact of the blaze will be keenly felt as the hospital is the only one in the region with a specialist heart unit. gareth barlow, bbc news. russian state media have released a series of videos which apparently show opposition figure alexei navalny in a detention facility in order to discredit him. two days after the putin critic declared a hunger strike, pro—kremlin media published clips of him walking without a limp to dispute claims mr navalny is suffering from back and leg pain. mr navalny began his hunger strike, saying he'd been refused access to a civilian doctor and that the

russian penal colony is a torture facility. a rebel group in the central african republic says its leader, sidiki abass, has been killed after being wounded in action. the united nations imposed sanctions on abass last year accusing his group, 3r, of having killed, raped and displaced thousands of people. the un also accused abass of participating directly in torture. the 3r rebels last yearjoined an alliance of other powerful armed groups which launched an offensive against the government. as the world marks autism awareness day today, we bring you a special report from ghana, where a music therapist has been helping children born with the condition overcome their speech difficulties by teaching them to sing. the world health organization estimates that globally, one in every 160 children has an autism spectrum disorder. our reporter charles mgbolu was able to observe their fun sessions and brings

us this report. she sings. at first glance, this looks like a simple music class with this child as the star performer. they sing. but there is something else going on. # we're riding down the road # and i don't know what to do...# meet mayuwrami ocloo. for seven years, she's been using music as a therapeutic tool to help children with difficulty with communication skills such as children born with autism. i feel the need to reach out because i believe music can make an impact in their lives. parents are highly frustrated, and the educational system here in ghana is not adequately resourced to help individuals with this challenge.

vero's son has been attending the sessions, and she says they've been beneficial. as parents, we go from hospital to doctor to doctor, and that's what we were doing. we went to the emt and they say there was something wrong with the ears or something. we went... so we've been going up and down. and this when we saw mrs ocloo at the school, we decided to come and see how the music could help. the who estimates that globally, one in every 160 children has an autism spectrum disorder. autism affects people in a variety of ways. some autistic people may live independently. some may require support in certain areas of their life. and others are full—time care. music therapy may not work on the more severe cases of autism. but she says these children are ambassadors. through them, she wants to bring hope to every

child living with autism. i feel elated. ifeel very happy, and it's just heart—warming to see when a child develops and moves on to another step. thankfully for these children, in this suite, music is possible in life now so much hope. charles mgbolu, bbc news, ghana. a captain's armband which the portuguese football star cristiano ronaldo threw away in disgust has been auctioned for around $75,000. ronaldo's gesture came in the dying moments of portugal's world cup qualifier in serbia last saturday after a debatable refereeing decision denied him a last—minute winner. the armband was retrieved from the pitch by a firefighter, who passed it on to a charity. the auction will benefit a six—month—old boy with a rare

neuromuscular disorder. bye— bye. hello there. it's likely to be a dry day for most of the united kingdom today, but there will be contrasts. where we keep the cloud as we had yesterday, temperatures will be held into high single figures, but in the sunshine, potentially 14—15. now, under the starry skies, that's where we see the frost as we start this saturday morning, but you can see the thicker cloud across northern scotland, central and eastern england, perhaps east wales. and there could also be a little bit of mist and fog where we've kept the clear skies as well. but the day is likely to give us quite a bit of cloud across central and eastern areas. it's likely to lift a little as we go through the day and the skies brighten. similarly so across northern scotland, we keep quite a bit. for the likes of lincolnshire, east anglia and the south east, though, it could remain overcast all day. and with that keen breeze still quite gusty through the channel, only eights and nines, but 13—15 in the sunnier spells. now, as we go through

the evening and overnight, we tend to thicken our cloud in the north, but under the starry skies elsewhere, again we can expect a touch of frost. but you may have noticed the approach of some rain for the north of scotland, and that's the start of the transition to much colder air. it's this particular weather front here, as you can see, and behind it, there's arctic air following. so, we are going to have another blast of cold air as we head through in towards easter monday, but for sunday, easter day, a little bit of mist and fog around. actually, we should see a bit more sunshine for england and wales, but cloudier skies with rain for scotland followed by snow and cloudier skies for northern ireland. eventually, we'll see some of that wet weather coming in through the afternoon. but notice the temperatures. we've lost that keen north—easterly. they're a little bit higher temporarily. but overnight sunday into monday, that weather front introduces that colder air right the way across the uk, an arctic blast for all of us. and notjust the cold air, but a strong to gale—force north wind, as well, which will accentuate the chill. clearly, the showers are quite prevalent for northern

scotland, but they may well work their way down through the irish sea, down the east coast of both england and scotland as well. but there should be some sunshine between, but itjust will feel much colder, more like winter. these are the temperatures on the thermometer, but you add on that wind—chill, and it will feel significantly colder. so, big changes afoot, and that may well last into the start of the new week into tuesday, as well, as you can see. as ever, you can keep up to date on the weather on the website. that's where all the warnings are. bye— bye.

this is bbc news — our main headlines...

a police officer has been killed in an attack near the us capitol building in washington after a man drove his car into two officers — before getting out of the vehicle and lunging at them with a knife. the man was then shot by police. he later died. the top homicide investigator for minneapolis has told the murder trial of derek chauvin, the former white police officer who was seen last year kneeling on the neck of the george floyd, the use of force was "totally unnecessary". mr chauvin denies the charges against him. oganisations representing the uk hospitality sector have joined a group of mps and peers in opposing the potential introduction of covid vaccine passports. the government says no decision�*s been made, but ministers have suggested documentation could be a "tool in the short term" to re—open theatres and sports stadiums. now on bbc news, lockdown: a year of loss.