welcome to bbc news, broadcasting to viewers in north america and around the globe. our top stories: more fallout after the air strikes on syria: the us threatens new sanctions against russia over its support for president assad. a drive—by shooting at a church in pakistan leaves two dead. the islamic state group says it was behind the attack. australian firefighters tackling a huge bushfire outside sydney say the blaze is still out of control. and capturing the sound of the stars. nasa's new mission to seek earth—like worlds and alien life. hello, and welcome to bbc news. the arab league hasjoined calls for an international investigation

into the use of chemical weapons in syria. the united states is preparing new sanctions against russia, targeting companies supplying damascus with chemical weapons capability. president putin meanwhile warned that any further western missile strikes against syria would cause international chaos. here's our middle east editorjeremy bowen. in damascus, journalists were shown one of the targets. the syrians deny it was a chemical and biological weapons site. the attacks were limited, a punishment, a message that the west won't tolerate the use of chemical weapons. the operation was designed to minimise the risks of starting a new war, by avoiding russians and iranians, the syrian regime's main allies. the russians still insist that the attack in douma a week ago was a conspiracy organised by britain. but these desperate attempts

to decontaminate civilians, and pictures of many others who died in agony, foaming at the mouth, prompted military action by the us, france and the uk. diaa, his wife, umm al—mour, and their children were among hundreds who were treated that traumatic night. their daughter masa's face, her pain and distress, went around the world. now, the bbc has managed to track them down to the relative safety of a camp in northern syria. the family's detailed accounts seem to corroborate the use of chemical weapons. translation: people were dying. suddenly, the civil defence came. they put us on the ground and poured water on us. then they took us to the medical centre, sprayed us, gave us injections. i was fainting. my heart was aching.

when we went to sleep, the planes shelled, and we were covered in dust. we went back down to the basement, and i saw how they were bringing the martyrs. instead of breathing air, we breathed the smell of blood. translation: i saw white smoke, like fog. our legs started to get weak. we started to lose the nerves in our legs. i had a shortness of breath and burning in the nose and chest. there was no oxygen, and we were fighting death to go upstairs and reach the higher floors. masa's father, diaa, says he heard a helicopter. the rebels don't have them, and the accusation is that the regime has delivered chemical weapons. translation: after four to five minutes, the regime started to shell us with artillery and rockets. after some moments, a helicopter passed over and some guys told us to go down one floor. president assad met russian politicians, with his regime, its air force and helicopters untouched by the weekend's attacks. the us, france and britain decided against forcing regime change years ago.

no wonder the president looked relaxed. jeremy bowen, bbc news. the american ambassador to the united nations, nikki haley, has declared that washington is now preparing sanctions on russia over moscow's support of syria. and earlier speaking on fox news sunday, she denied reports that president trump plans to pull us troops out of syria within six months. one — wanted to make sure that chemical weapons were not used, or weapons of mass destruction were not used, in any way that could harm american national interests. he wanted to make sure that we defeated isis completely and wholly, to make sure that all of that threat was gone, because it's a threat to american national interests. he wanted to make sure we had good grounds to watch what iran is doing, and iran is a national threat to american interests. and so i think that, no, he never thought he would get out

in 48 hours. yes, it's all of our goal to see american troops come home. but we're not going to leave until we know we've accomplished those things. what he has done is talk to our allies and said they need to step up more, they need to do more, and it shouldn'tjust be us doing it. and i think that is the right approach. but be very clear. if we leave, when we leave, it will be because we know that everything is moving forward. in an interview on french television, president macron, has said he persuaded president trump to keep us troops in syria in the long—term. president macron also defended airstrikes by france, britain and the united states, saying they were solely in response to a syrian chemical weapons attack. earlier this month, the american leader had been considering withdrawing a two—thousand—strong force deployed there. a short time ago i spoke to our correspondent in washington, chris buckler, about how the syria policy is evolving there.

if you listen to the us ambassador to the un, nikki haley, today, today she said they have a number of priorities in syria. president trump was not talking about that two weeks ago. two weeks ago he was specifically talking about the islamic state group being about the islamic state group being a big threat and they have now largely been defeated in that area, so largely been defeated in that area, so what is the point in staying? making it clear that as far as he was concerned syria is not america's rob horne, it is a bigger problem, and others would have to step up to the plate. —— america's problem. president macron of france has given indication he has been instrumental in speaking to president trump and giving him food for thought about what should happen here. there have

been divisions within the white house but according to nikki haley, who is the us ambassador to the un, there is a new set of pirate is. some of that is about iran, some of it is about the use of chemical weapons within syria, and of course the concerns that potentially islamic state could develop and form in some way and actually find themselves a bigger grouping than they currently are, after all of the work of us troops. so we do have an idea of what the americans want from syria. a wider strategy, as far as the wider conflict is concerned, thatis the wider conflict is concerned, that is something that we still don't know anything about, really. they sound determined, according to nikki haley, determined that russia be punished in some form for supporting president bashar al—assad of syria? yes, we are speaking now about the potential world of diplomatic sanctions. in this run of expulsions of what the russians called diplomats and what the americans call spies, and of course some economic sanctions,

particularly on vladimir putin's in a circle, you can see there is this aggressive stance, diplomatically, with russia. however, it is syria which remains that dangerous fault line in the relationship tween vote countries. russia and america —— between the two countries. russia and america do not agree on a whole range of issues, but syria is one of thoseissues range of issues, but syria is one of those issues which could cause a lot of problems between them. much of that depends on president assad's regime and exactly what happens next in syria. nour adam is a syrian journalist from eastern ghouta and was reporting from there before the population was evacuated ten days ago. he now lives in idlib. i asked him for his view on the bombing by the us, france and britain. do you feel any safer there? no. it is maybe the same, because here or there are, there is warming. —— and

bombing. when we were in eastern ghouta, also there was bombing. but in ghouta, more than here. hundreds of thousands. and in ghouta there was the chlorine gas and this aaron —— the sarin. all of this did not stop for about five days. did you yourself, while you were living in ghouta, did you yourself experience any of these chemical weapons attacks? yes, yes. i is there instead more than four times. —— i experienced this more than four times. in different cities come back to 2013. --

times. in different cities come back to 2013. —— cities, back to. times. in different cities come back to 2013. -- cities, back to. low you not happy —— were you not happy to see the us, france and return act, because the assad regime used these alleged chemical weapons? —— france and britain. had that not make you please? no, actually, because when assad used chemical weapons on us in ghouta and many places in syria, and he also used on assad the missiles, the chemicals and also the warming and the shooting, they also kill. —— big warning. —— the bombing. more protests have been held in barcelona, against the detention of a number of catalan

separatist leaders. the arrests were made after last october's referendum on independence from spain, which the government in madrid said was illegal, and an act of sedition. former us first lady barbara bush is said to be in "failing health" and no longer seeking medical treatment. a statement from the office of her husband, former president george bush senior, said the 92—year—old has chosen to focus on "comfort care." the islamic state group says it was responsible for killing two christians and injuring seven more in a targeted attack in western pakistan. officials said the assailants in quetta, capital of balochistan province, shot at worshippers from a motorbike as they left church. lebo diseko has more. they were leaving their place of worship when they became victims of terror, gunmen on motorbikes apparently from the so—called islamic state opening fire on these people as they left church. translation: the injured people belong to the christian community. we rushed the injured to the hospital. two of the injured, who were in a serious condition, died later.

the drive—by shooting happened in quetta, the capital of balochistan, an area that has seen its fair share of violence, and a minority group that has done, too. it is here that four members of a christian family were gunned down after easter, and at least ten were killed by suicide bombers in a church a week before christmas. is says it carried out those attacks too. as night fell, the anger was visible, protesters blocking roads and burning tyres on the streets. but, given the violence and instability in this province, it is unlikely to be the last time that this community and others find themselves being targeted. stay with us on bbc news, still to come: the head of the world's largest advertising agency steps down —

following a probe into his personal conduct. pol pot, one of the century's greatest mass murderers, is reported to have died of natural causes. he and the khmer rouge movement he led were responsible for the deaths of an estimated 1.7 million cambodians. there have been violent protests in indonesia, where playboy has gone on sale for the first time. traditionalist muslim leaders have expressed disgust. the magazine's offices have been attacked and its editorial staff have gone into hiding. it was clear that paula's only contest was with the clock, and as for a sporting legacy, paula radcliffe's competitors will be chasing her new world—best time for years to come. quite quietly, but quicker and quicker, she is seenjust to slide away under the surface and disappear. this is bbc news.

the latest headlines: more fallout after the air strikes on syria, as the us threatens new sanctions against russia over its support for president assad. a drive—by shooting outside a church in pakistan has left two christians dead. the islamic state group says it was behind the attack. a bushfire that has been burning out of control near sydney over the weekend has been downgraded on monday morning as winds eased. hundreds of people have been forced to leave their homes, and australian police say they suspect the blaze may have been started deliberately. phil mercer reports from sydney strong winds have pushed the flames toward suburban streets, about 35 km from

the centre of sydney. as the blaze approached, many residents left, while others stayed to join a huge firefighting effort. authorities said the fast—moving outbreak was aggressive and unpredictable. while 500 firefighters confronted the inferno on the ground, they were supported in the skies by more than a dozen aircraft. very warm autumn weather and a lack of rain have turned bushland on sydney's outer fringes into a tinderbox. we have to deal with the worst that mother nature can throw at us. and the worse australians are presented with by nature, the better it brings out the australian spirit. conditions in the fire zone are reported to be easing, but crews will again be working through the night to try to contain the blaze.

south—eastern australia is one of the world's most fire—prone regions. most outbreaks are sparked by lightning, or accidentally by powerlines. sometimes, more sinister hands are to blame. australian police believe this monstrous fire in south—western sydney may have been lit on purpose. experts say that australia's annual bushfire season is starting earlier and ending later. they believe that climate change is making the threat worse. phil mercer, bbc news, sydney. deadly slow—moving storms are generating record snowfall and low temperatures in the us midwest, leaving stranded airline travellers and thousands without power. parts of minnesota are under a blizzard warning. and in michigan, snowfall is expected to reach 18 inches in some areas. there are also tornado watches in effect over the carolinas — while extreme weather warnings are in place across the gulf coast. a group of mps, peers, business leaders, and celebrities

came together to launch a campaign to give the public a vote on the final brexit deal. those backing the people's vote, launched at an event in london, say it wouldn't be a re—run of the referendum but the public must be given the chance to either accept or reject britain's deal with the eu. correct it is such a huge and momentous moment in our history and it should not be left simply to politicians —— brexit. so i want to urge that we think again and that we insist that the decision about whether to accept the brexit deal is a matter for the people. the founder and chief executive of the world's largest advertising group wpp, sir martin sorrell, has resigned — less than a fortnight after it announced he was being investigated for misconduct. he leaves after 33 years in the job and denies any wrongdoing. our business editor simonjack explains. advertisers want you to remember

the products they're selling, not the name of the company that made the ads. many of the biggest ad agencies, marketing companies and pr firms in the world are owned by an even bigger one. it is called wpp, and was founded and run since 1985 by this man, sir martin sorrell. he gobbled up dozens of businesses, creating a £15 billion global giant with enormous influence. sir martin has defined british advertising for almost 30 years as a businessman. so his departure has caused an enormous shockwave through the industry. a big figure on the world business stage, his views were sought—after. .. if the eu does not give on that, then our access... ..and he was happy to oblige. after 33 years at the top, he stepped down with immediate effect, after recent accusations he may have misused wpp funds — claims he denies. meanwhile, upstarts have changed the industry,

with more advertisers going direct to facebook and google rather than via wpp agencies. the company has lost a third of its value, prompting this farewell statement. his critics say he ran the company like a private fiefdom, when he actually owned less than 2%. a pay packet of £70 million in 2015 drew outrage from politicians and rebellion from shareholders, some of whom told the bbc this weekend it was time for change. for many in the world of advertising, sir martin sorrell was more of a money man than an ad man, treating it like a professional service rather than a creative industry. but he was a powerful advocate for it, and in his departure, british business has lost a true giant. simon jack, bbc news. nasa is set to launch a mission to look for planets around the stars

closest to us. a critical part of the tess mission is to capture the vibrations from the stars, which can be turned to sounds. this will help researchers identify their age and size. our science correspondent, pallab ghosh has been to the kennedy space centre in florida where the space telescope is due to be launched monday night. the night sky is littered with stars — they shine and they also sing. these are the vibrations of a distant star, similar to our sun, converted into sound. and this is another bigger and older star. professor bill chaplin is analysing these sounds. of course there is no air in space so the stars cannot actually be heard, but they do vibrate and so generate sound waves. and professor bill chaplin has discovered that each star has its own song, depending on how big and hot it is. when we hear the sounds

of the stars, first of all, it tells us that out of this turbulence, this almost chaos, we get these ordered sounds and it is incredible that stars resonate just like a musical instrument, and this gives us a way to actually study stars and see what their insides look like in a way that is just not possible by other means. this will be the first mission to scan nearly the entire sky, sector by sector. the sound a star makes will tell scientists how big and how hot it is. many of them will have planets in orbit around them, some will be too close. those that are the right distance away will be the ones most capable of supporting life, in what scientists call the goldilocks zone, where the temperature is just right. george ricker is the mission‘s lead scientist believes one day it may be possible to send probes to some of these distant worlds and see if there really is life out there. there are about 100 stars that lie within 20 light years of earth, and if you were to send out

an armada of probes to those and you can basically get up to a speed of say 20% of the speed of light, then under those circumstances, you could expect to reach these planets within100 years. in a few years' time, we will know how each of the stars in the night sky sound and whether the planets around them might harbour life. pallab ghosh, bbc news, kennedy space centre. lui hock seng, an 81—year—old photographer, has been taking pictures of singapore street life for more than 50 years. his photos have captured a city that has long vanished amid rampant development. thousands of beyonce fans have been treated to a rare reunion of the

girlgroup. it is treated to a rare reunion of the girl group. it is the first time beyonce and her former bandmates have performed together since 2015. destiny's childhood together from the late 1980s until 2006 and had several hits. rumours have been circulating that they would have a reunion doing —— during a beyonce's show. good morning. i think it's pretty safe to say it's been a miserable april so far, hasn't it? but things look likely to change as we move through this week. yes, if you haven't already heard, we're heading for some warmer weather. there will still some rain in the forecast, mostly out to the west, and at times some strong to gale force gusts of winds. but, you want to know how warm it's going to be — well, we could see highs of 25 degrees in london, that's 77 fahrenheit. and widely across the country, we could see temperatures peaking into the low 20s. so something to look forward to. ahead of that though for today, quite a quiet start to our working week.

this area of low pressure will slowly start to push in, bringing some wet and windy weather but not really until the end of the day. a little bit of showery rain to ease away from scotland, cloudy skies first thing. hopefully they should brighten, the best of the sunshine likely to be along the south coast, highs of 11 to 15 degrees. now the winds will strengthen and the rain arrives from the west. some wet and windy weather is expected, gale force gusts of winds through the night across northern ireland, north—west england and scotland. so some of that rain really quite intense to start the day on tuesday, but as it pushes its way out of the borders, it really will fizzle out quite considerably. a band of cloud and drizzle by then. behind it, somewhat fresher conditions but brighter conditions, so temperatures will peak perhaps at around 1a degrees. but if we can keep some sunshine ahead of that weather front, we could see highs across eastern and south—east england of 18 or 19 celsius. move away from tuesday and we look at the weather story across the near continent with this high pressure building. now, this is going to deflect frontal systems coming in from the atlantic up into the far north and west and really influence

the story, and with the winds swinging round in a clockwise direction around that high, it drags in this warmer, drier south—easterly flow and hence the reason for the marked change in the story for april. so that means as we move into wednesday, we will see some showery outbreaks of rain into northern ireland and western fringes of scotland, maybe a little more cloud. but through the borders and into central and southern england and wales, we'll see some dry, sunny weather and some warmth starting to build, 19 to 20 degrees the high on wednesday. on thursday, just a little bit of fair weather cloud out to the west, maybe a little bit of coastal mist but nothing particularly untoward, and generally speaking, lots of sunshine, light winds and yes, that's when we could see temperatures as high as 25 degrees, 77 fahrenheit. the last time we had temperatures like that — back on the 29th of august last year. this is bbc news.

the headlines: the us has threatened new sanctions against russia over its support for president assad. the move, which follows the western air strikes on syria, will target russian companies supplying damascus with chemical weapons capability. australian firefighters tackling a huge bushfire outside sydney say the blaze is still out of control, even though winds have eased. some residents have been instructed to seek shelter as evacuation is too dangerous. police say the fire may have been started deliberately. the islamic state group says it was responsible for killing two christians and injuring seven more in a targeted attack in western pakistan. officials said the assailants in quetta, capital of balochistan province, shot at worshippers from a motorbike as they left church.