the less chance there is of innocent lives being lost or changed forever. and — the wonders of graphene, the british invention that could save many lives. and coming up in sportsday later in the hour on bbc news, we'll have the results from tonight's four premier league games, including manchester united's match at home to everton. good evening. there are many children among the victims of a suspected chemical weapons attack on a town in syria. at least 58 people were killed and hundreds injured. the prime minister, theresa may, described it as an act of barbarism. the white house said it was certain that the assad regime was responsible. both syria and its russian allies have denied any involvement. the attack was focused on the rebel—held town of khan sheikhoun. in idlib province. the un security council will meet tomorrow in emergency session. this report by our middle east editorjeremy bowen includes distressing images from the beginning. this boy was one of hundreds of victims of the attack. he is showing traffic symptoms of poisoning, perhaps by a military strength nerve agent. the victim's lungs were badly affected. rescue workers did what they could to decontaminate the victims, that includes removing clothes, or where the poison can linger, and by spraying fresh water. the attack happened in carroll, a place that has been heavily bombed by the regime and russians in the last few days. it lip province —— it is in idlib province. the hospital was overwhelmed by casualties. translation: all our wounded, some are dead, there are many suffocation cases. there was intended unsystematic shelling. there doesn't seem to be much oxygen there that could have saved more people. translation: there that could have saved more people. translationzli there that could have saved more people. translation: i lost my son, my children, my neighbours, my daughter. they are all gone, i only have god left. this morning it looked just like their chemical attacks in 2013 near damascus. confronted with seems just like this president 0bama threatened military action, and then pulled back when syria gave up its chemical weapons. if this latest mayhem was caused by a regime attack, it suggests some chemical weapons were held back. condemnation is coming in from around the world. i'm appalled by the reports that there's been a chemical weapons attack on a town south of idlib, allegedly by the syrian regime. we condemn the use of chemical weapons in all circumstances. if proven, this will be further evidence of the barbarism of the syrian regime. we have understood it was a chemical attack and it came from the air. we will be stimulating all those who have the capacity of finding out technically what happened. president assad's regime has denied it launched the attack, but if that's not true, what's in it for them? this idlib is one of the last rebel strongholds in syria. perhaps someone strongholds in syria. perhaps someone in the regime thought it was time to increase the pressure. president assad's regime is much stronger than it was when the last big chemical attack happened in 2013. perhaps the way the president faced down american threats back then makes him think he can get away with it again. when local activists were still reporting what happened, the hospital was hit by air strikes. jerry smith supervise the removal of the syrian weapons arsenal after the 2013 attack. everything they declared left the country, we can absolutely guarantee that. the issue then becomes, is this new stuff? if it is indeed a warfare agent. 0r then becomes, is this new stuff? if it is indeed a warfare agent. or is it is indeed a warfare agent. or is it undeclared ? what's happened in khan sheikhoun shows once again that the syrian war is farfrom over shows once again that the syrian war is far from over and the long list of war crimes committed in this war has another entry. jeremy bowen, bbc news. in a moment we'll speak tojeremy, but first let's join jon sopel, our north america editor, who's at the white house tonight. this very confident assertion by the white house that the assad regime is responsible... is that likely to lead to any action? the simple a nswer to lead to any action? the simple answer to that is we don't know. the white house said it was a reprehensible act and that the civilised world must act against it. there has also been condemnation from president trump of barack 0bama. the statement went on to say, these venus actions by the bashar al—assad regime are a consequence of the last administration's weakness and he resolution. you will remember barack 0bama said that a red line would be the use of chemical weapons. chemical weapons were used and he didn't do anything about it. in no small part down to parliament having also voted to reject it before he was about to make a decision here in the united states. but in answer to your question, donald trump hasn't said there is a red line over which we will do x while z. he has pulled back from saint bashar al—assad must stand down as the syrian leader. it has all be made more computer aided by his relationship with russia. this time yesterday he was on the phone to vladimir putin saying, offering condolences for the st petersburg terrorist attack and saying, we must stand united in the face of terror. but look what happened. you have a situation where the assad regime may have done this and russia is assisting the syrian regime. how do you stand united in that situation? many thanks. jeremy zuttah with me. -- is many thanks. jeremy zuttah with me. —— is with me. i suppose the question is is president assad making an assumption he can get away with it, if he has done a question mark is allegations, we haven't got proof circumstantial evidence points in that attempt direction. proof circumstantial evidence points in that attempt directionm proof circumstantial evidence points in that attempt direction. if it was an error attack, regime planes and russian planes were in the air at that time. yes, they have been here before. 2013i that time. yes, they have been here before. 20131 was in damascus, and along with the rest of the population there i was essentially waiting to be bombed. it didn't happen. after that i felt the regime was reinvigorated, it was almost like they felt they'd stared barack 0bama down and he'd blinked first. and once the americans had threatened and then not taken it through, ifelt threatened and then not taken it through, i felt the threatened and then not taken it through, ifelt the regime threatened and then not taken it through, i felt the regime was threatened and then not taken it through, ifelt the regime was more confident and felt stronger after that. it could well be that they simply think that this is an option they've got, they will use it, the world didn't do anything last time, maybe the world won't do anything last time. and if they do what do something, they also have big friends in their corner of the ring as well, particularly president putin. jeremy, thank you. 0ur middle east editor, jeremy bowen, there. in russia, investigators have named the man they suspect of carrying out the bomb attack on a metro train in st petersburg yesterday. they say akbarzhon jalilov, who was 22, was a russian citizen originally from kyrgyzstan in central asia. investigators say he detonated a device that killed 1a people and injured dozens of others. they also believe he left a second bomb at another station. 0ur correspondent steve rosenberg has the latest. this is what chaos looks like, underground. this mobile phone footage was shot seconds after the bomb. there is a mad scramble to get out of the train alive. smash it, break it down, says a voice. some passengers were helped to safety. give me your hand... at that moment someone cries, mum, mum. the injured are pulled away. this man was on the train, one carriage down. translation: there was a flash, then panic. people screaming, crying. at moments like this, you think about your parents. how will they live without you? when i got out of the carriage, i could hardly stand. i was in shock, i was shaking. i saw blood, body parts, a horrifying scene. and here's the station today, wreckage cleared, service back. st petersburg trying to be normal. it is astonishing how quickly a scene of chaos and carnage can be replaced by an air of normality. as you can see, the metro is up and running again today. but look over here and you see a reminder of yesterday's drama. people are normally rushing by in the metro, not today. some here said prayers for the dead. but returning to normal isn't easy. more metro stations were shut today because of bomb threats. 0ne hero from this tragedy is the driver of the bombed train, for keeping calm and not stopping in the tunnel. translation: i was just stopping in the tunnel. translation: i wasjust doing stopping in the tunnel. translation: i was just doing my stopping in the tunnel. translation: i wasjust doing myjob. russian investigators now say that yesterday's attack on the train was carried out by 22—year—old man from central asia, who'd been living in st petersburg. they are searching for clues to explain why. that's a question that people of st petersburg are asking. this has been a day of mourning here, a day for paying respects to the victims, to the passengers of a metro train who never made it home. steve rosenberg, bbc news, st petersburg. ken livingstone, the former mayor of london, has been suspended from the labour party for two years, for asserting that hitler supported zionism. he has already served one year of the suspension. the national executive committee found him guilty of breaching party rules. speaking after the decision was announced this evening, mr livingstone said no one should be suspended for stating the truth. some labour mps said he should have been expelled, as our political correspondent alex forsyth reports. waiting to hear the fate of one over labour's biggest figures. in here, a disciplinary panel decided. ken livingstone did bring the party into disrepute, but he's not been booted out. still a member but he's been suspended for a yearfrom out. still a member but he's been suspended for a year from holding office or representing the party. what's your reaction?” office or representing the party. what's your reaction? i expected them to expel meats, so i've now got to consider whether i challenge this legally or just live with to consider whether i challenge this legally orjust live with it. -- expel me. comments made on a bbc interview last year started the controversy. while defending a colleague allegations accusations of anti—semitism, ken livingstone said this... when hitler won his election in 1932 it was that the dues should be moved to israel. he was supporting zionism before he went mad and ended up killing 6 million jewish people. some labour collea g u es jewish people. some labour colleagues were furious, accusing him of anti—semitism. divisions again laid bare, with some supporting him. everybody in the labour party, and particularly democrats throughout the country, should read resist the attempt to have free speech on israel closed down in the labour party. debate is the essence of democracy. and again tonight mr livingstone stood by his comments. i know you've consistently said you are not anti—semitic, but do you recognise the offence your comments have caused this? he said they'd been misreported and used to undermine labour's leadership. d chairman of the board ofjewish people said for me to have said hitler was a zionism is deeply offensive... he believed it. that was seven weeks after what i said. and even then he didn't know. this is what's so wrong about the fake news and the rubbish level of our media these days. do your comments have helped labour's cause? anything that tells people the truth, helps. ken livingstone's comments fuelled a wider row about the labour party and anti—semitism. jeremy corbyn was accused by some are failing to do enough to stamp it out. that's something he has consistently denied this, insisting there is no place for anti—semitism within the labour party. but some think this decision, a partial suspension not an expulsion, sends a different message. it sounds like some kind of revolving door system, where you are 0k to revise the history of the holocaust, cause pain and anguish to holocaust, cause pain and anguish to holocaust survivors, said quietly for 12 months and re—emerge as a political figure. they should have shown ken livingstone the door because if they had done, that would have been a golden opportunity for the labour party and its leadership to send a clear message that labour is genuinely opposed anti—semitism. so his immediate future may be decided but the debate rumbles on foot up to my‘s decision is unlikely to end what's been a difficult and divisive issue for labour. alex forsyth, bbc news, westminster. a couple from craigavon, in county armagh, have beenjailed for holding a woman captive for years and sexually abusing her. keith baker was sentenced to 15 years, his wife caroline to three years. the police officer who led the investigation described it as the "most depraved crime" that he'd ever encountered. the worst—polluting cars could be forced to pay up to £24 a day to drive in central london under plans outlined by the london mayor, sadiq khan. the new charge will come into effect in 2019 and will cover the same area as the current congestion charge. it will apply to diesel cars over four years old in 2019 and to petrol cars more than 13 years old at that time. in colombia, the first funerals have been held for the victims of the devastating landslide which happened on saturday. at least 260 people were killed when a wave of mud destroyed an extensive area in the south—west of the country. the president has declared an "economic, social and ecological emergency." he spent the night in the town of mocoa, which was the worst affected. 0ur correspondent, laura bicker, is there and sent this report. in mocoa they are finding their missing, but after days of desperate searching, there are no comforting reunions. those who have survived pick through the remaining possessions. this man has lost family and friends, but he saved many lives in the worst hit neighbourhood of san miguel with just a simple flashlight. he calls it his saviour. translation: i was the only one who had a flashlight. the darkness was everywhere and people everywhere were shouting/ i tried to shine light on them, when they shouted, "here she is, the saviour." they're doing all they can to try to reclaim their homes from the mud. the people who settled here were already displaced after years of conflict and now, once again, they have nowhere to go. columbia has endured 52 years of war and now its president says they must prepare for another battle, one against a changing climate. he believes warmer and wetter conditions are on the increase and he says it's turning this mountainous landscape into a killer. but, for now, there is a more immediate problem — no clean running water and, with so many dead bodies still to find, this is a breeding ground for disease. and still they search, but with little hope. over 300 people are still missing, many of them young children. work is already under way to try to repair and rebuild the scar this torrent of water has left on the town, but the wounds it has inflicted on its people may never heal. laura bicker, bbc news, mocoa, columbia. prince harry has paid tribute to his late mother, diana, princess of wales, for her work in raising awareness of landmines and the dangers of unexploded munitions. in a speech at kensington palace this evening, harry said he wanted help to "finish the job and rid the planet of landmines. " as our royal correspondent, nicholas witchell, reports. it was one of the many images of her that caught the world's attention. diana, princess of wales, a matter of months before her death, visiting a mine clearance operation in angola. she met people, many of them children, who'd lost limbs to this most indiscriminate of weapons. she couldn't understand why the world wasn't doing more, and she said so. i am committed to supporting in whatever way i can... her intervention upset some politicians who called her "ill—informed." a few months later, diana was dead. but the world had heard, a treaty was passed, real progress was made. forward now to 2017 and it is her son, harry, who is challenging the world to finish his mother's work. his speech tonight was personal and heartfelt. he recalled that his mother had been a voice for all those who'd felt marginalised. she knew she had a big spotlight to shine and she used it to bring attention on the people that others had forgotten, ignored or were too afraid to support. in august 1997, one month before her death, diana went to bosnia. there she'd met two boys, both of whom had lost their legs to landmines. to one of them, a boy called zarco, harry said she'd made a promise. when my mother said goodbye to zarco that august, just weeks before her untimely death, she told him that he would not be forgotten. please, help me keep her word to zarco and malic and other people like them throughout the world who still need us to finish the job and rid the planet of landmines. harry met zarco and his friend malic, both grown men now, both though still struggling with the life—changing effects of weapons of war which, as diana pointed out 20 years ago, kill and maim without discrimination long after the wars are over. nicholas witchell, bbc news, at kensington palace. theresa may has been meeting senior officials in saudi arabia on the second day of a visit to develop closer trading and security links with the gulf states. the prime minister rejected criticism of her visit from those who draw attention to saudi arabia's record on human rights. she said she'd have no difficulty in raising what she called "hard issues", including saudi involvement in the war in neighbouring yemen. 0ur deputy political editor, john pienaar, is travelling with the prime minister. a warm welcome for theresa may, and this time no—one could blame herfor enjoying it. her day started with a visit to this uk—supported secondary school in oman, where these children, jordanians and syrian refugees, learn and dream, some told her, of becoming doctors. the smiling face of british policy in the region. it's not all this easy. next stop, saudi arabia and down to business, boosting trade, mostly lucrative arms sales. earlier, she'd brushed aside those who say it's wrong to support and sell weapons to a country so criticised for its record on human rights. well, the important thing for the united kingdom, when we meet people and we want to raise issues about human rights, is if we have the relationship with them, then we are able to do that. so rather than just standing on the sidelines and sniping, it's important to engage. war across the border against rebels in yemen is being led by a saudi coalition. british weapons sales to saudi arabia were worth over £3 billion in the first year of the fighting up to last march. planes, arms and target training — britain's contribution to the yemen war effort. there's famine, mounting civilian casualties. britain joins the aid effort while supporting its saudi ally. mrs may spelled out her new mission. what is the may doctrine of foreign policy? well, the may doctrine of foreign policy is that everything we do is in our british national interest. it is in our british national interest to have good relations around the world, so we can trade around the world, that brings jobs and prosperity to the uk. it's also in our national interest to ensure that we are working with others around the world to maintain our safety and security and, yes, it is in our national interest to ensure that the values that underpin us as britons are values that we promote around the world, and that's what we do. so today she was a house guest at a saudi palace, meeting the crown prince, the kind of relationship she's keen to cultivate for post—brexit britain. the prime minister needs to strengthen political and trading links beyond europe if britain is to remain a strong, global player after brexit. no—one knows how well britain will come out of its eu divorce. a committee of mps said today that ministers had no idea and needed