peace. >> let it be written, let it be done. (laugh) johnny, thank you. more than 40 are killed in a bus attack in the pakistani city of karachi. i'm richelle carey, you're watching al jazeera live from doha. also ahead - the u.n. security council calls for peace talks in yemen as a 5-day ceasefire comes in effect a main travel route in the u.s. has been shut down after a train crash kills five north korea's defense minister is executed after being

accused of disrespecting leader kim jong un we begin with pakistan. 43 people have been killed in a gun attack on a bus in karachi. the vehicle was carrying members from a branch of shia muslim. we'll go to kamal hyder, joining us from the capital islamabad. what more do we know about this? >> according to an eyewitness a laid -- lady on the bus she said motorbike riders stopped the bus and the attackers entered through the rear door and told everyone to get down. two children were separated.

after that deadly attack the attackers made good their escape. this is the first attack on this group here in pakistan. the group responsible for the attack is jondula, an anti-shia group, with a big footpath in ball ujize tan and has been involved this attacks. this is one of the deadliest attacks, and the first deadly attack on the community in the city of karachi i understand that you said that the gunman got away. any updates or process on finding and locating them if it's clear who the group is. >> they are a group that has been involved in targetting the shia community, especially in

balochistan. the police inspector general is saying they are finding their best to locate the whereabouts of the assassins. there's a search operation under way, this is a large city and the attacker are able to escape with ease. it will be interesting to see whether the government will get clues. if they do not, small arms were used, and people were attacked at close range. they were shot in the neck and head with an aim to kill many on board. >> 43 killed. kamal hyder lie in islamabad. thank you a 5-day truce in yemen seems to be holding in most parts of the country, despite reports of houthi shelling. the ceasefire was proposed by the saudi arabia to allow in aid. ban ki-moon has been

calledcalled on to convene peace talks. at least 10 people were killed in houthi attacks in the southern city of tiaz. meanwhile, an iranianship is on its way. iranians are escorting a vessel in the gulf of aden. the special envoy has arrived in sanaa, and says the only way to end the war is through political dialogue. >> a political solution is the only way to get-yemen out of this crisis. i met the ministers in riyadh. all are hopeful of going back to the negotiating table to start a national dialogue. we support the dialogue between the warring factions according to the gulf initiative hashem ahelbarra joins us live from saudi arabia's capital

riyadh. what is the thinking about this ceasefire, about whether it's holding, whether it's not, whether it's on the brink? >> well now, the - it's holding in yemen, despite the sporadic clashes in places. and standing over residential area by houthi fighters much this was expected for the reason we are not talking about the regular army or the tribesman we had to gather reignite those in the country, there's attempts to further nail down the ceasefire, it's why the envoy is there, to ensure that a successful ceasefire could be further extended to five days

and at the same time talk about the critical way out of the crisis in yemen. >> so the ceasefire was about to get to the humanitarian aid. has there been process made on that front. >> when international aid agencies are moving to address the needs of the people. you are talking about thousands forced to leave the areas. dozens of thousands trended, displaced and thousands left yemen because of the deteriorating situation. there's a shortage in basic commodities - food, water electricity, gas and medicine, this is why the international community is looking forward to the ceasefire has been extended. >> as you said about the ceasefire, there seems to be pockets where it's expect,

because you're not dealing with a traditional army. how does that complicate the possibility of getting to a real ceasefire. >> you have many obstacles in yemen. al qaeda is expanding in areas stretching to abada north, and there are tribesman determined to continue the fight against houthis, expanding in different parts of the country. there are forces loyal to salah, who made it clear when their leader was targeted in a saudi air strike. that continues to defend the country with an aggression against yemen, it's a mounting tension. an issue facing the international community is to try to mend the tensions putting an end to the conflict

so a genuine political settlement about a permanent solution that has been beset by decades of war, instability and poverty. >> decadesed in. hashem ahelbarra reporting for us. a train accident in philadelphia killed at least five and injured more than 50 others. the passenger train derailed on its journey from washington d.c. to new york city. it shut down services in the region. >> reporter: the amtrak trail derailed minute after pulling out of philadelphia 36th station. all six passenger cars and the engine ran off the tracks, crashed into each other flipping on to its side. some overturned. >> i felt like the brakes were hit hard. our car, it started to go to the right. i raised my arm. we saw it go like that you

could see it off the tracks. we rolled and rolled. next thing we were pushing out the emergency exit. i was outside. people were screaming and bleeding. we helped them out. they are okay now. >> most of the 243 people on board walked away from the scene. dozens were injured and a few are confirmed dead. hundreds of police officers firefighters and emergency workers rushed to the accident site. investigators are trying to find out what went wrong. >> i have been down on the tracks on the scope with my staff. it is a disastrous mess. never seen anything like this in my life and most will say that as well. >> the northbound train was travelling from washington d.c. to new york one of the busiest routes along the nearby corridor of the united states. nearly 100 trains travelled between new york and

philadelphia on weekdays carrying thousands of passengers. services are suspended and will remain so for the coming days. gabriel elizonda joins us live from philadelphia, hours after the horrific experience for many people. what is the latest. well we are here at the crash site. you can't see too closely, because this is as close as the police are letting us get. the crash site is a block behind me, behind the police line. it's a little after 5am. local time in philadelphia. once the sun comes up in the next hour 45 minutes or so. investigators will be able to get a true sense of how bad the accident was. the local newspapers in philadelphia came out in the last half hour.

i want to show them do you. this is the philadelphia daily news and the headline is "train of director, death, mayhem as amtrak derails" and the main "five die as train derails." it was a serious accident five died and why so many are following this. it's not just because of the death toll and injuries but the train line is one of the most heavily travelled train lines in all of the united states and certainly here in the eastern sea board of the united states. this is a train route that is travelled by thousands of people every day. and it's very much a route that now, at least, is stopped by investigators, while they try to piece together what caused the

accident gabriel elizonda live for us. more to come on al jazeera. nepal - dozens hit again by a major aftershock plus threat to the arctic. why some accuse president obama of selling off the arctic to big oil.

. >> the top stories now on al jazeera. gunmen in pakistan kill 43 passengers in kir achy. all of those killed belong to a

community that follow a branch of shia islam a passenger train from washington d.c. to new york city derails in philadelphia killing five and injury many others the security council is calling on ban ki-moon to conphone peace talks on yemen. the 5-day truce proposed by saudi arabia to allow in humanitarian aid for more, we are joined by joseph a senior writer at "gulf news", we appreciate your time so much. a few hours into the ceasefire, it seems broadly to be holding. if not in certain pockets. what are the challenges to a ceasefire like this. >> the houthis are divided. there's a group of fighters that want to accept the ceasefire, and there's another that is

upped the influence of the iranian government. that is not with the terms of the ceasefire. after five days there has to be consequences of what will come to the negotiating table whereby president abd-rabbu mansour hadi must return to yemen in ord too start the negotiating process. so we are not sure whether or not the houthis will speak with a single yois or whether there'll be urght divisions, especially if the iranians are behind recent developments. >> there's a ship it has aid and journalists on it. the saudis say we'll accept it if we can look and inspect the ship. >> more than a month into the war, it will be difficult not just for the saudis but any government to accept the transfer without humanitarian

sppss. it's unrealistic to accept that ships will not be boarded and inspected. >> do they expect this is it posturing? >> it is posturing. the iranians believe they have the upper happened and the fact that the saudis have not been able to win the war so far. it's an indication that it's not going as well. the fact that the war is dragging may persuade them that they could smuggle in additional weapons. >> there is a full embargo around yemen. it's difficult to smuggle things in. the airports have been bombed. nevertheless, they'll try to provide assistance to the houthis. it's not going to happen. it's not going to work. not just the saudis but all the coalition insists that if there's a transfer it has to be suspected first.

>> iran has denied aiding the houthis. . >> they have the rort speaks for itself. during the past several years, it has not started a month or two ago, it started in 2009 since there were tremendous squirmishes. and the iranians admitted they have provided assistance to the houthis, several commanders in the force, the opposition forces that fight inside iran claimed four capitals are under control. baghdad in iraq. beirut lebanon and samar. there's a lot of branding going on, where there's smoke, there's fire. >> i am sure we'll call on you again, thank you. the governments of malaysia

and indonesia say they'll turn away rohingya and bangladeshi migrants. we have this report from veronica pedrosa. >> reporter: stopping and searching for perpetrators and victims of human trafficking. for months this joint operation between the down and police has squeezed the business of human trafficking and people smuggling. set up in november the antihuman trafficking checkpoint is emblematic of a that police crackdown. the point is to deny traffickers from using thailand as a transit point on the way to the ultimate destination in malaysia. the thailand police chief proposed examples be built from mean a mar to bangladesh. >> the crackdown is the main agenda of this meeting between

the thats and police. >> our joint operations with malaysian police are carried out through legal obligations and humanitarian principles. >> what about the people at the heart. >> thais say they are only allow to bring food to rohingyas in shelters like this. they want conditions to improve. >> translation: we hope the problem of human trafficking could be solved in the best way. they should try to give them dignity and human rites >> reporter: if they escape they are kept in another form of detention much >> translation: the thai muslim community here wants to know why the government wants to protect

them. they don't want to give them freedom, because they are concerned. >> what is happening in thailand is being mirrored across the region. rohingya and malaysia say they'll turn back boat people. >> there's nowhere in the world for the "rock newman show"rohingya to live safe, free, normal life thousands of migrants from myanmar to bangladesh is held in malaysian detention centers. the malaysian government has been urged to find a permanent solution. this report from the north-western island of lang cowy. >> reporter: frightened and exhausted hundreds face an uncertainly future. many face being trapped at sea by ruthless traffickers, who

beat them and provide little food or water. >> people on the boat, three months two months. they were collecting more and more. 300, 400, 500. >> reporter: authorities are moving them to existing detention centers. human rights say the government needs to find a permanent solution. >> the government should think of a way to stop human trafficking. if they don't. trafficking will go on, and get out of control. >> al jazeera has been told crowded boats will not be allowed to enter malaysian waters, unless they are sinking. >> we expect a few ships to come in. we are getting ready. we can accept them the united nations is warning that a humanitarian crisis is unfolding with thousands of desperate people still drifting in the ocean.

human lights groups are urging the government not to turn back migrants at sea, saying it's equivalent to signing the death warrant south korea's intelligence services says north korea's defense minister has been executed. he's believed to be the latest in a series of senior officials to be executed this year. harry fawcett reports on south korea's capital soul. >> is this the year the defence minister sealed its fate. south korea says he dosed off during a military meeting in april, and was executed days later. he was said to have be executed for treason, expressing dissituation with kim jong un's leadership. >> translation: our government

sees such execution is a way to promote kim jong un's one and only regime. >> reporter: the suddenness of the fall he was envoy a month ago, leads them to question the stability. south korea's intelligence agency says 15 others have been executed. >> there has to be better systematic ways to ensure the order of the system. this quick removal was carried out and indicated the weakness of the system, not the strength at all. unlike the case his uncle publicly humiliated before his execution, there has been no official announcement. >> his death was public and violent, shot by heavy calibre machine-guns in front of the crowd of hundreds. it's not the first time he was accused of killing people.

last week the human base organization released the satellite image showing what it believes is a similar killing in objectment anti-aircraft guns with a range of 8,000 meters aimed at target 30 meter away. north korea worried the south by showing off the ability to launch a missile, undetectably from the submarine. seoul says it's monitoring effect on leadership for what it calls a rain of terror. now, just over 24 hours since a magnitude 7.3 aftershock hit nepal. 66 people are confirmed to have been killed. and it happened almost three weeks after a larger earthquake killed nearly 8,000 people. andrew simmonds has more from kathmandu. >> reporter: reliving a nightmare, just when people have begun to believe they could return to something near to normality. crush injuries head injuries fractures. some of the medical staff are in

shock as well. this quake may not have been as big as the last, but kathmandu's hospitals are overwhelmed again. no one wants to be inside a building when what follows is half-a-dozen aftershocks within minutes. on the casualty list is a man running an orphanage filled with children. >> i tried to jump out the building and i got hurt. then my children was all crying and scary here and there. >> reporter: this is one of the landslides caused by the aftershock, in the north of the country, in an area recently cleared by previous landslides. remarkably no one was hurt. parliament was in session when the quake struck. after a few seconds of disbelief deputies ran from the chamber. outside there's panic, with people trying to get through on cellphones from relatives and friends. >> translation: it was shaking

like this. everyone ran. everyone left and went to an open area. this place is dangerous. we have to leave. >> translation: people are scared in their mind. they don't know how they'll live eat and work. going into a building, you don't know what will happen. >> reporter: church teams found themselves trying to save lives. dozens of collapsed buildings. many in the rural areas in the east of kathmandu, near the epicentre. >> this was a family home a search team was deploying. there is a high level of fear. in some cases, terror that exists now. many are fleeing the capital, but they'll final little comfort out of the city american president obama is opening up sections of u.s.-held areas of the arctic to oil

companies. shell has been granted permission to work there. environmental groups are outraged. >> reporter: shell tried drilling for oil in the arctic. in 2012 it was forced to abandon operations when an oil rig ran aground and a contractor pleaded guilty to eight counts for violations in relation to a drilling ship. shell declined a request for an interview. the company says it will be different this time, it will take a thoughtful approach and be subject to rigorous safety standards. shell will drill from july to october, at the dealted less than 50 meters. it hasn't reassured those opposed to arctic drilling. >> there no technology to deal with a spill in the environment of the arctic ocean. the last time shell was there,

the shells alone were more than they could handle. the bottom line is that it's a dirty dangerous business, there's no technology to match the conditions of the ocean. . >> shell proposes to drill in the sea. there's no roads or ports within hundreds of kilometres. the coast guard location is over 1600km away a key migration route for mammals. the u.s. bureau of ocean management said there would be no significant impact. the u.s. arctic seas contained 22 billion of recoverable oil and 26 meters of gas. some question why the obama administration continues to approve potentially dangerous drilling. >> if they never spill a drop, and everything goes perfectly, we can't burn the oil. scientists made it clear. there was a recent article in

nature magazine confirming this that all of the arctic is unburnable in a world where we avoid climate chaos. >> they'll need more permits before drilling can begin thanks for your time, be sure to visit the website aljazeera.com. ♪ ♪ too many debates, too many candidates, and in the end, a compromise nominee. looking back at the 2012 presidential race, republicans said we are not going to do that again. fast forward to 2015 and depending on the day, there are almost 20 declared, prepared or rumored candidates. the crowded g.o.p. field, how it helps and hurts the party.