welcome to bbc news. our top stories: russia repeats its demands that america must prove that chemical weapons were dropped by syrian planes against civilians. the two powers agree to meet. swedish police reveal details about the man they believe was responsible for the lorry attack in stockholm and say he was known to the intelligence services. meanwhile, in neighbouring norway, police find a bomb—like device in oslo's city centre. they've cordoned off a wide area and a man has been detained. and the basque separatist group eta is handing over the last of its weapons, moving a step closer to ending half a century of violence. hello and welcome.

russia has demanded the us provide evidence of its claim that chemical weapons were stored at a syrian air base targeted in a missile strike on friday. meanwhile, the uk foreign secretary, borisjohnson, said the chemical attack has fundamentally changed the situation in syria. he has called off a visit to moscow. the us secretary of state has had a phone conversation with his russian counterpart ahead of face—to—face talks next week. this was president trump's message to the syrian government and its russian backers yesterday, delivered with force. the united states and her allies reject syrian denials they used a chemical weapon against civilians, including children. now britain's followed up with a diplomatic rebuke. boris johnson's called off talks in moscow on monday and issued a written statement instead.

developments in syria have changed the situation fundamentally. the planned visit by borisjohnson to moscow would have been the first by any british foreign secretary for five years. a long gap reflecting the very bad relationship between britain and russia which already existed. but the events of the past week in syria have now provoked an even deeper crisis. russia's first response came in this tweet from their embassy in london, accusing boris johnson of theatrics for lack of argument and inviting people to listen instead to what they call russia's soft power. a link leads to this excerpt from tchaikovsky's patriotic 1812 overture, celebrating past russian

military victory. instead of seeing the russians on monday, borisjohnson will be talking to america's secretary of state, rex tillerson, and other allies to agree next steps. but some syrians who've suffered most, like abdul hamid al yousef, want further military action. he lost 20 members of his family, including nine month old twins. and it was a photograph of the dead twins being carried by their father which helped persuade president trump he had to order the missile strike. translation: i would like to thank president trump and the us administration on the initial steps they took against the airport that killed my children and all the martyrs. but i didn't expect the strikes to stop. i was surprised. why did president trump stop the strikes? why one airport? why one base? tonight, russian television has been showing pictures it says show syrian

aircraft flying once again from the base damaged by america's cruise missiles. next week, the political message attack will be reinforced when rex tillerson, not borisjohnson, goes to moscow for the trump administration's first meetings there with the russian leadership. they'll be very tough encounters. james robbins, bbc news. our correspondent rajini vaidyanathan is at president trump's residence in florida and gave us this update. well, president trump is spending the weekend here in florida at mar—a—lago anti— hadn't had any political engagements. it's understood he spent a few hours playing golf in florida, but we did hear from officials late last night in mar—a—lago that the us is planning to implement economic sanctions against syria in the coming days. we don't know when exactly. that is the next stage. in

terms of military action, well, us officials always stressed that the strike on friday night was a retaliation simply because serie a used chemical weapons. so it it is really u p used chemical weapons. so it it is really up to what syria does next in terms of whether any more military force will be used. but certainly the signal that they want to use sanctions shows that the us strategy is to try to punish syria in other ways. in sweden, police say the man arrested in connection with the lorry attack in stockholm on friday was known to the security services. he is a 39—year—old man from uzbekistan. the attack killed four people and wounded fifteen others. detectives also say they found a suspicious device inside the truck. danjohnson reports from stockholm. late last night, a glimpse of the ordinary delivery truck that was turned against people in a moment of terror. it was towed away to be examined and police made a worrying discovery.

we have found something in the truck in the driver's seat. a technical device which should not be there. i cannot at this stage say that this is a bomb. the man they think was at the wheel has connections here, a poor suburb north of the city. he hasn't been named but he's a 39—year—old from uzbekistan. we understand he was registered at one of the addresses in this block, although we don't know if he actually lived here. people have told us the police will here in number until the early hours of the morning and they've taken some people away for questioning. in the city, after yesterday's horror, time to think and to reflect on chance decisions that determined death or injury for some, a lucky escape for others. patrick and francesca are tourists who were in the basement of the department store when the truck hit.

we went up the escalator and we saw panic and we saw police with guns and stuff like that, so... how did people react? everybody was screaming and running to the other side of the building and we took the side entrance and we went out. and we just kept running to the other side of the city. and you wanted to come back today? yeah, yeah, just to show that we care. sweden's crown princess led her nation in paying tribute, a further display of the strength and resilience of this society. tonight the area reopened and more people came, to be close, sharer —— share a moment. this attack means consideration of some serious and difficult questions, but it impact is only just starting to sink in. —police in neighbouring norway say

they've found a bomb—like device in oslo's the city centre. the area in gronland has been cordoned off and a suspect has been detained. the bomb squad is now at the scene. the national broadcaster nrk is quoting a police officer who said the device has limited potential to cause damage. we can now show you an image from the scene. do you have an update? we are still waiting for the police to make an official statement about the latest events. about half an hour ago what the police said was it was a controlled detonation. it was quite a loud explosion. police now say that they are checking to see if the debtor nation was successful. at this point there can be many loose threads and sketchy details, so we

shouldn't conclude too much, but it seems now that here in the heart of oslo, the crowd seem to be scattering. life seems to be going back to normal, but as you can see behind me there is a heavy police presence. police are carrying what i am told is a submachine gun, not normally carried by police. police here are normally an armed. can you tell us who the target of this attack might have been? no, it is too early to speculate. we don't know still if we can call this an attack. but police are taking it very seriously. they have seen this as some kind of destructive device and decided to do a debtor nation. now if somebody wanted to place the device in the centre of oslo, that

means to create fear or chaos. the area is known to be a multicultural area, with lots of bars and restau ra nts, area, with lots of bars and restaurants, but also mosques and a sizeable immigrant population. given what happened in stockholm on friday, is that in the back of people's minds? are people anxious? yes. it seems to be so. norway like many other countries has become somewhat numb to the terrace threats. i've been to some other areas in oslo tonight and life seems to be going as usual. people are still enjoying themselves, even after the alert of the suspected bomb came. it seems that message would be to any terrorists that

nobody has succeeded tonight in creating fear in oslo for top thank you very much for speaking to us on bbc world news. nearly three and a half tons of explosives and dozens of guns have been found at eight sites belonging to the basque separatist group eta. that's according to the french authorities. it follows the group's decision to hand over all their weapons in their bid to end more than four decades of violence, which has killed more than 850 people. our chief international correspondent lyse doucet reports from the french basque city of bayonne. arms caches uncovered. french police carry the weapons away. eight hidden dumps surrendered by eta. three tonnes of explosives, 120 guns. today, in the basque region in south—west france, a peace rally.

they also want to see proof on the big screen. a video of an arms dump encircled by volunteers. basque civil society played a key role, persuading eta to give up its guns. there were decades of car bombings, assassinations. in eta's bloody campaign for basque independence. eta's file was finally handed over at city hall from civil society to international witnesses. i was allowed to sit in on this ceremony. everyone spoke of an historic moment. i'm convinced that eta is handling the weapons it has under its control. i'm not sceptical because eta declared a ceasefire and end to violence six years ago and they monitored the ceasefire. since the declaration, there's not been any incidents of violence by eta. for spain's government, they're still terrorists. translation: the terrorists cannot

expect any kind of favourable treatment from the government and even less impunity for their crimes. a local police chief, one of many victims. his wife rosa remembers every detail of the day eta shot him. my son told me, mama be strong. any steps towards peace are good, she now says, but accuses eta of making too much of today's ceremony. but it mattered to many basques. you can really feel the excitement here in the basque region, a sense of something important happening. but 50 years of violence have left a deep wound, especially in spanish society. a dark chapter is ending but a reconciliation has yet to start. lyse doucet, bbc news, bayonne. stay with us on bbc news.

still to come: what really happens when we make and store memories is unravelled in a discovery that's surprised even the scientists who made it. 55 years of hatred and rage, as theyjump up on the statue. this funeral became a massive demonstration of black power, the power to influence. today is about the promise of a bright future, a day when we hope a line can be drawn under the bloody past. i think that picasso's works were beautiful, they were intelligent,

and it's a sad loss to everybody who loves art. this is bbc world news. the latest headlines: russia has called on the us to provide evidence for its claim that there were chemical weapons at the syrian air base targeted by an american missile strike on friday. swedish police say they are confident they are holding the man responsible for friday's attack on shoppers in stockholm. thousands have been paying their respects to the victims. to iraq, where the fight for mosul has slowed right down, with iraqi forces facing fierce resistance. the city is the last major stronghold held by the so—called

islamic state in the country, particularly the western side of the city. over the past five weeks, the iraqi security forces have lost nearly 300 soldiers, while more than 1,000 have been wounded. our defence correspondent jonathan beale reports. it has been called the toughest urban fighting since the second world war. the battle for mosul is still far from world war. the battle for mosul is still farfrom over, world war. the battle for mosul is still far from over, but world war. the battle for mosul is still farfrom over, but it world war. the battle for mosul is still far from over, but it has already brutally scarred the city. snipers are gunning down the iraqi forces, and slowing the advanced —— pinning down. mortarfire, as well, as we witnessed on the frontline. a dangerous place, as the armed vehicle in front of us is about to find out. that is the blast from an

is rocket. we had to move fast to avoid being the next target. we are unsure as to what is going to come around the corner here, where is are. we have just around the corner here, where is are. we havejust come under sniper fire. there were mortar is going off near us, fire. there were mortar is going off nearus, and fire. there were mortar is going off near us, and then a vehicle in front of us got hit by an rpg. they are still within firing range, these are the streets recently freed from is control. these are the ones who managed to escape the extremists' clutches. many he had, as the battle reach their doors. —— hid. like bashar and his family, who feared the extremists were taken to be used as human shields. he says is told of run to move within the hour. they

said anyone who stayed behind would be burnt in their home. we were rescued just in time. many civilians, though, are trapped as the fighting becomes harder. both sides breaking down walls to move undercover, a deadly labyrinth, with the enemy sometimes hiding in the same building. downstairs was until recently same building. downstairs was until rece ntly a n same building. downstairs was until recently an is position. they are making sure they don't come back. this is unforgiving urban warfare, againstan this is unforgiving urban warfare, against an enemy that has had three yea rs against an enemy that has had three years to prepare, and is proving ha rd to years to prepare, and is proving hard to spot. with the iraqi security forces never sure what might be around the corner. in other news: thousands of people are taking part in anti—government rallies in caracas, and cities across venezuela. they are angry at the government's ban of the country's top opposition leader, henrique capriles, from office.

the two—time presidential candidate was banned friday from holding political office for 15 years. a court in italy has given the ride—hailing service uber ten days to withdraw its smartphone app, and any associated marketing. the court upheld a complaint lodged by italy's leading taxi associations, which argued their traditional services were suffering unfair competition. uber said it will appeal. a three—storey apartment building has collapsed in south—western poland, killing five people, according to national media. it happened in in swiebodzice, and rescuers say two of those who died are children. four others have been taken to hospital. the authorities are investigating the cause of the collapse, but a gas explosion is suspected, as david campanale reports. there are dozens of rescue workers

at the scene of the collapse. they are slowly working their way through the rubble of the apartment building, in the search for possible survivors, and to recover bodies. two of the building's floors may have caved in due to a gas explosion, according to a localfire department. the main gas line to the building has now been shut off as a precaution. translation: we are also clearing the street from debris, because part of the building collapsed on it. it is not known if there were any passers—by in the area. our operation is going on. we area. our operation is going on. we are stabilising the structure of the damaged building. the operation is carried out in very difficult conditions. we need to stabilise the structure to make sure the rescuers are safe. 17 residents are registered as living in the apartment block. some of them were not at home at the time of the building collapse, and are now accounted for, but it means the search has to continue. specially

trained dogs have been brought in to help, but no signs of life have been detected. the dalai lama has addressed thousands of followers at a monastery in north—eastern india. it is where he took shelter when he fled tibet in 1959. the monastery is located in a disputed area in the state of arunachal pradesh, near india's border with china. ashleigh nghiem reports. this has been an emotionaljourney for the dalai lama. this has been an emotionaljourney forthe dalai lama. he this has been an emotionaljourney for the dalai lama. he is on his seventh visit to the 300—year—old monastery. it is a place which has national significance for the tibetan spiritual leader. he first came here nearly 60 years ago, after fleeing tibet and escaping chinese guards to cross the border into india. the monks offered him shelter, while india gave him political asylum. but it was this man who helped secure his safety. the indian border guard escorted the

dalai lama into the country in 1959, and this was their first meeting since then. for india and china, there is much more at stake. this area has immense strategic value. india is expanding its infrastructure across the state of arunachal pradesh, with plans for new roads and railway. china has never recognised the region as a pa rt never recognised the region as a part of india, and it sees it as an extension of tibet. ageing this week lodged an official protest with the indian ambassador, accusing delhi of giving the dalai lama a platform to push for tibetan separatism. india insists the visit is purely religious, and the dalai lama says his week—long trip is to promote harmony. china isn't convinced, so the crowds expected to gather for his teachings over the next few days will only cause more concerned across the border. there could be hope for millions of dementia patients, following new research.

it is after a group of scientists made a significant advance in the way our memory works. they found that we make one memory for the here—and—now, in one part of the brain, and another memory for a lifetime, in another part. here is one of those involved in the study, professor susumu tonegawa, to explain more. on the day of acquiring a memory, a memory is quickly formed, not only in the hippocampus, but in the cortex. however, interestingly, these... the memory which is formed in the cortex, it's not very active. it is silent, which means that if you apply visual cues, —— recall cues, whenever you need memory you

need a stimulus, which recall recall cues, so if you apply it recall cues, so if you apply it recall cues, the memory in the cortex cannot be easily retrieved —— without recall cues. while memory in the hippocampus can be retrieved. are you saying that our memories are effectively being backed up? yes, it is... what we are saying is, depending on where memory is stored, whether it is stored in the hippocampus or cortex, the ability of recall cues to retrieve them is drastically different. the one in the hippocampus can be easily retrieved, but the one which is stored in the cortex cannot. and it turns out that, in alzheimer's studies, that we have found a way to convert silent memory kit active

memory, by manipulating the memory holding cells. and we could cure the early alzheimer's memory impairment. so these findings indicate a similar state exists naturally in the process of memory and processing in oui’ process of memory and processing in our normal brain. just finally, how significant are you think your findings are? we have made significant progress in understanding how the short—term memories are converted to the long—term storage of that memory. that fundamental aspect of science. thank you for being with bbc world news. hello there, good morning. sunny

weather at the masters, sunny weather at the masters, sunny weather here as well, and delivered on the temperatures are very similar as well. now, yesterday we had high as well. now, yesterday we had high as widely, 20, 21 for england and wales, lovely day at aberystwyth and once again in aylesbury, with the blue skies. more of that sunshine to come today as well. we are going to see some changes come into the north—west, though. this cloud has been close by over the past day or two and it will start to move into the uk over the next 2a hours, and bring with it a significant change in the weather. well, clear skies ahead of that means it is quite chilly first thing this morning, maybe one or two mist and fog patches across southern parts of england and into east anglia, but those were last long at all, but once the sun comes up we those were last long at all, but once the sun comes up we are those were last long at all, but once the sun comes up we are going to find the pollen levels rising. i again across england and wales, probably for the last day in a

while. the sunshine will be there in the morning, lifting that distant fog across england and wales. sunshine to start with across southern and eastern scotland but more cloud moves down from the north—west, with some rain, and we could see clouds filling in across the irish sea as well. so a different drum at a different look to the weather in scotland and ireland, and in the afternoon we have this cloud, the rain becoming light and patchy as it moves across scotland. not much rain either but images will be lower. later in the afternoon we will see this rain across north—west england, so also west wales. it may arrive a little sooner across cornwall, but you can see in exeter it is still sunny into the afternoon and for many central and eastern parts of england lots of sunshine. very warm as well, 2425 degrees in eastern england, just like augusta. a long day in sunderland for the football and the premier league, but those changes as the cloud arrives in merseyside. and this is the last of the warm air on sunday for quite awhile, i suspect, as colder comes behind that weather front on a north—westerly wind. once again that weather front producing little or no rain. again it is dry across the south—east, as it has

been for a long time now, in most places will be dry on monday. there will be more cloud developing and we have seen over the weekend, a few showers here and there. though showers here and there. though showers in northern scotland could be heavy enough to give some wintry airover be heavy enough to give some wintry air over the hills, it will be that col struggling to make single figures in northern scotland, and a drop of eight, nine degrees across parts of england and wales, and much chillierfield to parts of england and wales, and much chillier field to the day on monday. quite a shock to the system, as well. that chilly north—westerly airflow gets cut off by high pressure building on from the atla ntic pressure building on from the atlantic and around the top of that we get a westerly wind, which will blow in more cloud across scotland and northern ireland, quite gusty winds as well. some heavy rainfall northern scotland. england and wales, though, should have lighter winds. it should be dry, and once again we will see some sunshine. the latest headlines from bbc news. russia has demanded that the us provides evidence for its claim that there were chemical weapons at the syrian air base targeted by a missile strike in the early hours of friday. the us secretary of state will have a face—to—face meeting

with his russian counterpart next week. swedish police say they're increasingly certain that the uzbek man they've arrested is the one who carried out friday's attack in stockholm, but that others may have also been involved. the authorities said they'd found a suspect device in the lorry he used. police in the norwegian capital oslo say they have found a bomb—like device in the city centre. the area has been cordoned off and a suspect has been detained. police in oslo and other norwegian cities began carrying guns on friday in response. now on bbc news, it's week in, week out. the actor ian puleston—davies speaks about his obsessive compulsive disorder, or ocd.