this is bbc news. the headlines at apm. the us says china agrees that north korea's threatening behaviour can't continue — after the country's failed missile test earlier today. voting in turkey has just ended as people decide whether to change the country from a parliamentary to a presidential republic. 68 children are among the dead in syria after yesterday's bomb attack on buses carrying evacuees from besieged towns. also in the next hour: renovation work near lambeth palace leads to an historical discovery. builders found the tombs of five former archbishops of canterbury, dating back to the 17th century, in a hidden chamber beneath church foundations. and in half an hour, join us for weather world, airside at belfast international airport. where nick and i will be going behind the scenes to find out what it takes to keep these planes flying, whatever the weather. good afternoon and

welcome to bbc news. president trump's national—security adviser has said an international consensus against what he called north korea's threatening behaviour now includes china. he said that the united states was working with allies and the chinese leadership to develop a range of options into what he described as a pattern of destabilising behaviour. earlier, the us vice president, mike pence, arrived in seoul hours after a failed missile test ivanov. the american vice president visited south korea's national cemetery, where the names of 104,000 soldiers who died fighting north korea nearly 70 years ago are listed.

mr pence knows this history, because his father served in the war. his big message now — the alliance remains. this morning's provocation from the north is just the latest reminder of the risks each one of you face every day in the defence of the freedom of the people of south korea and the defence of america in this part of the world. he landed a day after a fearsome display of weaponry, 100 miles to the north in pyongyang. but as though to undermine that image, north korea today tried and failed to fire off a missile. us officials said the launch came from the sinpo region, the second such launch from land in that area, which also has a submarine base. talk of war is now ramping up. it's not clear though if mr trump has decided on attacking north korean nuclear facilities.

south koreans are watching developments closely. 25 million south koreans live within range of north korean artillery. all the same, south koreans tend to assume war will not happen. life goes on. all mr trump's predecessors from clinton onwards have contemplated military action. mr clinton contemplated bombing north korea's nuclear facilities and pulled back, because the threat of retaliation would probably bring on a second korean war. mr trump may or may not be like the presidents before him — he says he's not. in a complex situation of great danger, he is the new unknown factor. his attitude to risk and military action is hard to gauge. stephen evans, bbc news, seoul. 0ur correspondentjohn sudworth

is in the north korean capital pyongyang, and earlier gave us his assessment of the situation. his movements are being monitored and tightly controlled. in many ways this is business as usualfor north korea, using brinkmanship and tension to up the ante and then win diplomatic and economic concessions as it steps back from the brink. but with each cycle moving one step closer to its goal of becoming a fully fledged nuclear power. what is new in this is not what is happening in this capital but in washington. but it seems that north korea's actions suggest that it is confident that president donald trump will like his predecessors eventually conclude that the cost of military action is simply too great. donald trump has made his first comment on twitter since that missile launch.

he said, "why would i call china a currency manipulator when they are working with us on the north korean problem?" and here, the foreign secretary, borisjohnson, has warned north korea to comply with the united nations resolutions and, in his words, to "stop these belligerent acts". with me now isjohn hemmings, a research fellow at the centre for strategic and international studies. good afternoon. how do you see things standing just now?” good afternoon. how do you see things standing just now? i think it's obvious that donald trump has tried to make this really about china. the only thing he can do, looking back at the past 15 years of attempted and failed negotiations, is to push north korea's main ally and source of resources to do something, so i think even the moving of the carrier fleet, the something, so i think even the moving of the carrierfleet, the uss vincent group, that is about

pressuring the chinese, implying the threat of action. but i don't think he is serious about doing anything. anybody on his security of staff have told him that unilateral military action on the peninsula is a nightmare scenario. is the risks are too great in terms of what comes back. absolutely, seoul in artillery range, 13,000 artillery pieces within range. potential use of chemical weapons, and this is a regime not afraid of causing mass casualties. what of north korea's intentions? clearly the intent is there, even if the execution of this failed missile wasn't on this occasion. i think, at failed missile wasn't on this occasion. ithink, at the failed missile wasn't on this occasion. i think, at the worst, they want to check nuclear deterrent from the us in order to continue provocations with the south. you could argue that the military still carries dreams of unification at their hands. that's a worst—case scenario. 0n the more benign side,

they want to survive, the kim family wa nts to they want to survive, the kim family wants to stay in power. they use the promise of a strong state with a military to keep the support of the military, so i think itjust depends on that range of things. if you are a planner in washington, seoul or tokyo, you may have to think worst—case scenario. tokyo, you may have to think worst-case scenario. what do you think the chinese are up right now? i think the chinese have gotten away easily and lightly. in the cold war, the us kept a number of its allies from developing their own nuclear weapons, including south korea. the chinese have never been in that position. —— the us helped a number of its allies. trump has, as we have seen with his tweet, hinted that he will go easy on trade issues if they resolve this. what can they do, they can offer nuclear deterrence to the north korean and say, if you get rid of your own nuclear system, we will

extend the deterrent and put you under our nuclear umbrella. they have the power to stop the north koreans, of course the north korean economy is so dependent on china. the real question is beijing's strategic calculation. because they look at that border between themselves and north korea and they would fear and including government and all the implications that brings. absolutely. -- they would fearan imploding brings. absolutely. -- they would fear an imploding government. they have never really been willing... i mean, they have been willing to step up mean, they have been willing to step up in new york at the night —— at the un, but on the border they have watered down a lot of that. if we could see them doing a little bit more, you know, stopping the coal ships was demonstrative, but how about all the weapons? we are seeing these trunks going through the parade, many of those manufactured in china. i don't believe they are not doing all they can. we saw some doom laden headlines on the front of

some of the papers yesterday. are they going to far at this point? the headlines? yes. given the stakes of the korean peninsula, and understanding that people way these things up that labelled so i wouldn't like tojudge things up that labelled so i wouldn't like to judge either way. john hemmings, thank you. polls have closed in a referendum in turkey on the biggest changes to its political system in modern times. under the proposals put forward by the president, the post of prime minister would be abolished and power concentrated in the presidency. 0ur correspondent is in istanbul. what are you hearing? it is only one hour since the polls closed nationwide in turkey, and the tv channels have already started broadcasting the initial results, and they state, official news agency has started reporting on the first

results. the first results suggest that the yes votes are ahead. they put that at 60%, and the no vote at 40%. if the put that at 60%, and the no vote at a0%. if the results stand as they are, it will mean that the turkish nation, the voters today have decided that it is time for a constitutional change in turkey, time for a presidential system to replace the parliamentary system, and it's time for president erdogan to gain extensive powers extensive executive powers. but it is early hours, it is still, as i said, one hours, it is still, as i said, one hour since the polls closed, and accounting is still going on. word from the western cities, what the big cities, the urban cities have said, because they have more population than the rural centres, what they have said will be decisive. the turnout will be

decisive. the turnout will be decisive. the turnout will be decisive. the nation has spoken. there are already fears about rigging of the vote, because high electoral vote —— the high electoral board has decided to accept unsealed ballot papers, which hadn't happened before, so campaigners are already questioning the legitimacy of the vote, but it is early hours. let's see how the result will be in the next few hours and let the nation is decided. along do we think the overall cou nt decided. along do we think the overall count will take? the overall counting process, well, by midnight we will definitely know what the situation is across the country, but we expect to get a clear picture within two, two or three hours. now that the results are being reported, the early results are being reported. as i said, 60% no, 40% yes, but those numbers could change,

and drastically, maybe not, but we will have a clearer picture in two or three hours. wood thank you coming in istanbul. 68 children are believed to be among those who died in yesterday's suicide bomb attack in syria. a convoy of coaches was carrying evacuees in a pre—arranged exchange between the syrian government and some rebel groups when the car bomb exploded. more than 100 people were killed. —— more than 160 people were killed. the blast, on the outskirts of aleppo, tore through coaches that had left two pro—government towns surrounded by rebels. the bbc‘s lina sinjab is monitoring events from neighbouring lebanon and a little earlier she gave us this update from beirut. the death toll has risen, agencies are quoting around 112 killed in this blast yesterday. however, there were fears of retaliation on some buses waiting to be evacuated from the opposition side, that are besieged by the government, but so far we hear that there were no retaliation attacks, the evacuation went smoothly, and i've spoken to some activists

who made it to northern syria in the idlib town — this is the province, idlib province, that is held by the rebels. this is where most of the opposition that are evacuated, not only from these two towns yesterday but elsewhere, they are evacuated to. what happened yesterday has brought some solidarity to both sides after this blast where many children and women, mainly civilians were targeted. we have seen evacuation and help happening from opposition activists as well as loyalists, who ran to rescue the children who were targeted. the iraqi military says that in fierce fighting with islamic state militants its forces have pushed deeper into the heart of the city of mosul. after weeks of near stalemate, troops and police launched an attack in the area of the old city,

which has been an is bastion. the government forces say they managed to advance some 200 metres. the difficulty for government forces has been the area's narrow streets, which often makes it impossible to deploy tanks and armoured vehicles. a 90—year old sailor is missing after his empty dinghy was found adrift off the welsh coast. arthur ray taylor was last seen at 9:30am yesterday morning, when he left his accommodation to take his dinghy out from his boat club, in ceredigion. police have appealed to members of the public who were in the area yesterday to hand over any video or photos taken near the boat club, in case someone unwittingly captured an image of the missing 90—year—old. the headlines on bbc news: north korea has made a failed attempt to launch a missile, as the us vice—president arrives in south korea. polls have closed in turkey, where people have voted on constitutional change that could see sweeping new powers given

to president erdogan. theresa may urges unity over brexit and speaks out for the role of christianity, as she delivers her first easter message as prime minister. sport now and a full round—up from the bbc sport centre. good afternoon. liverpool have made sure they are continuing to put pressure on the other teams trying to finish in the top four of the premier league, beating west brom 1-0, premier league, beating west brom 1—0, moving them back up to third. jurgen klopp admitted it was a big win for them. reaching the champions league is rarely a stroll, but liverpool have been making light work of it of late. seven unbeaten, but they could have made it easier if roberto firmino's radar was working. wrestling control from west

brom wasn't too much of an issue, a tea m brom wasn't too much of an issue, a team that haven't scored for a month. kicking the ball helps. 0ne goalfrom lucas, one from fognini' 1-0 to goalfrom lucas, one from fognini' 1—0 to liverpool. a second goal would have calmed any nerves and james milner should have delivered it. what should have been a co mforta ble it. what should have been a comfortable win turned tense, not calmed when matt phillips burst forward. simon mignolet blocked his path. west brom's goalkeeper let forward as well, but west brom were not finished. fortunately, it didn't cost liverpool, who now move up to third, even if they made harder work of this than they need to. league leaders chelsea are trying to re—establish their 7—point lead at the top of the table after tottenham moved to within four points of them yesterday. that game kicked off

around 16 minutes ago, and marcus rashford has given united an early lead with a goal on seven minutes. a late controversial penalty from liam boyce earned ross county a precious point against celtic in the scottish premiership. celtic, who have already secured the title, had scott brown sent off in added time. with the score level at 1—1, patrick roberts put the champions ahead in the 78th minute before a dramatic finale at dingwall. the hosts earned the penalty when alex schalk went down under erik sviatchenko's challenge, but there appeared to be no contact. his manager admitted it shouldn't have been a penalty. county levelled and shortly afterwards celtic captain scott brown was sent off for a lunge on boyce. he's likely to miss next week's scottish cup semifinal against rangers, as the hoops chase a domestic treble. in the rugby union premiership, whatsapp are in action at the moment. they are 26 points — seven

up moment. they are 26 points — seven up against bristol. bristol could be relegated if they are defeated. saracens, in third place, playing northampton. great britain have finished joint fourth in the medals table at cycling's world track championships. after winning two silvers already in hong kong, elinor barker went one better, taking gold in the points race after a gripping battle with america's sarah hammer. it was britain's fifth medal and second gold of the five—day competition, following katie archibald's omnium success on friday. incredibly happy, yes, so happy. i have had two silvers and, until the last lap, it looked like being another silver, so i wasn't it heartbroken, so i am so happy and relieved that i got gold. at the crucible in sheffield, ronnie 0'sullivan is in action against qualifier gary ross. we can go to

live pictures of the match, which has just resumed. it is 8—5 oh sullivan against gary wilson, a former taxi driver making his debut in the competition. it's the first to ten frames, so oh sullivan isn't far away. 0n the other table, stuart bingham leads peter ebdon 3—0. that's all sport for now. you can keep up—to—date with all those stories on the bbc sport website. we will also have the bahrain grand prix commentary on radio 5 live. theresa may has used her first easter message as prime minister to say the uk is coming together after the brexit vote. the pm said opportunities would emerge from britain's decision to leave the european union thanks to the country's shared ambitions and values. she also stressed her belief in the importance of religious tolerance and freedom of speech. let us come together as a nation, confident in our values and united in our commitment to fulfil the obligations that we have to one another.

let us work together to build that brighter future that we want for our country. and let us together build a stronger, fairer britain that truly does work for everyone. the labour leader, jeremy corbyn, used his easter message to urge people not to stand by in the face of society's problems. the leader of the opposition said easter should be a time to reflect on the current challenges, both at home and abroad. it would be easy to retreat into our private lives because the challenges seem overwhelming, or allow ourselves to be divided and blame others. but we need to respond to these problems head on through action and support for social justice, peace and reconciliation. the tombs of five former archbishops of canterbury have been unearthed by builders undertaking refurbishment work near lambeth palace. the builders were levelling the floor of a nearby church when they accidentally cut into the foundations and discovered a hidden chamber.

inside, they found 30 coffins, with an archbishop‘s mitre resting on one of them. closer inspection revealed metal plates bearing the names of five former archbishops of canterbury, dating back to the early 17th century. with me is christopher woodward, director of the garden museum development project. that is the project refurbishing the church. when did you first hear of this discovery? a while ago and we we re this discovery? a while ago and we were quite shy about it, because we didn't quite know what to do with this great pile of confidence and we wa nted this great pile of confidence and we wanted to leave them in peace, really. we were doing this transformation in old medieval church into a museum, a deconsecrated church, and we didn't know if there would be bones or some

terrible hole, and they said they found a golden crown and, looking through the hole under the chancel, you could see the mitre lingering in the dark. it's an 18th—century replica of what the archbishop would have worn, makes to be placed on the coffin at the funeral, and there seemed to be about five archbishops among about 30 coffins. and nobody knew that they were there? we knew they had been buried there but the church had been rebuilt from top to bottom and other people's remains had vanished. it was the builders just moving aside this slab and looking down and seeing these brick steps. but the discovery into some context for us, in terms of its historical significance. the archbishops have been the primates ofa archbishops have been the primates of a world church. 0ne archbishops have been the primates of a world church. one of them is particularly famous, archbishop

bancroft, appointed by king james the first to put together the king james's bible, an astonishing piece of work that good piece of work where they had to put together bible with 47 writers. even though he didn't write it, it is the word is that he forced into which went out across thousands of churches, today, it is those words you hear if you are going past the church. what happens now? we don't know, it's new. we sent down an endoscope to try and read all of the words in the dark. we think we are going to try and leave it where it is, because they are dead and they deserve to be left there, but visitors to the museum next month will get a glimpse of these steps leading into the dark and perhaps one day we will do some more investigation. i mentioned refurbishment work going on. does that have to wait now? no, it sits on top of it. it is all, basically,

we build the new building like a modern museum popping up inside an ancient church, so it all sits above it, but you look down on this flight of steps leading into the darkness, but you would need's neck to see the archbishop's mitre. wood —— you would need an archbishop —— you would need an archbishop —— you would need a draft‘s neck. would need an archbishop —— you would need a draft's neck. the city of london, because of the thousands of london, because of the thousands of years of history the city embraces, occasionally something it read like this emerges. when i cycled here, i cycled past something in london which is about to be torn down to make way for some luxury flats, and that will go, and it's good to have some heritage brought back from obscurity. and here we are on easter sunday as well. guests. was that deliberate timing?|j on easter sunday as well. guests. was that deliberate timing? i think that's just the press. was that deliberate timing? i think that'sjust the press. it's was that deliberate timing? i think that's just the press. it's also important to feel how much the

church goes beyond the act of communion, how the church in which our museum sits at many functions beyond service, a community centre, a place of social welfare and gathering. what i like about the archbishops of that time, they were people of great breadth and dimension and activity. it's interesting to hear more about it. the number of people killed following the collapse of a rubbish dump in the sri lankan capital colombo has increased to 23. hopes are fading that anyone else will be found alive. a local resident told the bbc he believed another 20 people were missing. tonnes of rubbish fell on to more than 100 homes on friday when heavy rain caused the dump to become unstable. the government has announced it is doubling its funding to fight neglected tropical diseases, which affect more than one billion people in the world's poorest countries. £360 million will be given over the next four years to combat illnesses including river blindness, trachoma and guinea—worm. the issue's being discussed at an international conference

in geneva next week. the department for international development said the uk's support would protect more than 200 million people from a future blighted by tropical disease. police in guinea have raided two illegal zoos to arrest alleged wildlife traffickers. it's part of an investigation targeting influential and powerful people in the west african state — including a high ranking member of the army who'd planned to sell the animals in an increasingly lucrative international market. russell trott reports. locked up, lonely and unloved, one of dozens of endangered animals kept illegally in zoos in the west african state of guinea. the 33 animals rescued included chimpanzees, a baboon and ostriches from mali, as well as several turtles, crocodiles and even parrots. most are endangered and protected. some were discovered in small, cramped, rusty cages, left to fend for themselves

with very little food. translation: we will have to work on healing him, giving him good things to eat. he was all alone here, and the chimpanzees don't live alone, they live in big families, a bit like us. they were freed after raids were carried out at two zoos belonging to a guinean army colonel, ibrahima bangoura. he has been arrested after he voluntarily presented himself to interpol and is expected in court on tuesday. it follows a complex four—year—long investigation between conservationists, interpol and the guinea ministry of the environment. these are the lucky ones. they will be released back into the wild, part of a policy to dismantle a criminal network that sells protected species on the international market. russell trott, bbc news. now time to catch up with the

weather forecast. there is a lot of dry weather in the forecast for the next few days, but easter sunday has brought a fly in the ointment, this weather system across central parts. these weather fronts clearing to the south—east this evening, so dry weather developing overnight. a fair amount of cloud left behind with one or two clear breaks, which could allow some mist patches deform and also a touch of frost in places. towns and cities, probably 3—5, but the shipments dropping to freezing. tomorrow, some cold air starting to work in from the north, and with that, a band of rain and some sleet and snow, especially over high ground, moving from eastern scotland to north—east england. elsewhere, showers and sunny spells, at temperatures in the north really dropping away, and it will be cold and frosty on monday night. plenty of frosty nights in the week ahead,

but some fine, dry days with some spells of sunshine. hello, this is bbc news. the headlines: the us vice—president has said america's resolve to defend south korea has never been stronger. mike pence was speaking after north korea failed to launch a missile. votes are being counted after turkey's bitterly—fought referendum on increasing the president's powers. initial results suggest strong backing for the proposals, but many of the votes counted so far are from central and northeastern parts of the country, where support for president recep tayyip erdogan is strongest. the number of people thought to have died in a bomb attack in syria yesterday has risen to 126, including 68 children. builders renovating a medieval church in london have unearthed the remains of five archbishops of canterbury, lying for centuries in a forgotten crypt.