this is bbc news with the latest headlines for viewers in the uk and around the world. i'm lukwesa burak. us intelligence officials say saudi arabia's crown prince personally approved an operation that killed the journalist jamal khashoggi. police in nigeria are hunting for a group who abducted more than 300 girls from a school in the north west of the country. more good news on the effectiveness of covid vaccines as a british study shows even a single dose of the pfizerjab stops the virus spreading. first time i've been on top of the bus. is it really? not really allowed to. prince harry gets on a bus in california — to explain why he doesn't want to live in the uk any more. it was destroying my mental health.

i was like, "this is toxic. " yeah. so, i did what any husband or any father would do is, like, "i need to get my family out of here. hello and welcome if you're watching in the uk or around the world — and stay with us for the latest news and analysis from here and across the globe. the us government has published a report, compiled by its intelligence services — which accuses saudi arabia's crown prince, mohammed bin salman, of personally approving the operation which led to the murder of the journalist, jamal khashoggi. it's the first time the us has officially and openly accused the crown prince — who is a key american ally in the middle east.

saudi arabia has dismissed the american claims as negative, false and unacceptable. nick bryant reports. it was at the saudi consulate in istanbul thatjamal khashoggi met his brutal end. he had been lured there to discuss paperwork for his upcoming wedding, but he was strangled as soon as he entered the building by a team of saudi assassins who then dismembered his body. a saudi dissident, who wrote a column for the washington post, often criticising his country's authoritarian leadership. the motive was to silence him. the damning conclusion of the declassified intelligence report is that saudi arabia's crown prince mohammed bin salman, the country's de facto leader, approved an operation in istanbul to capture or kill the saudi journalist. the assessment was based on the crown prince's control of decision—making in the kingdom, the direct involvement of a key adviser and members of his protective

detail in the operation. these aren't new findings. the trump administration had suppressed this report. ahead of its release, presidentjoe biden spoke by phone to king salman of saudi arabia, the crown prince's father, all part of a deliberate move by the new administration to alter the relationship with the saudis, to be tougher on this oil—rich kingdom. our administration is focused on recalibrating the relationship as we have talked about previously and certainly there are areas where we will express concerns and leave open the option of accountability and there are also areas where we will continue to work with saudi arabia, given the threats they face in the region. already mr biden has ordered an end to arms sales, and other us support to the saudis in their war in yemen. as a candidate he referred to saudi arabia as a pariah state but he's stopped short of imposing sanctions on mohammed bin salman, the future king, who is known as mbs. this new, tougher approach has

drawn support from both democrats and leading republicans. look, this is a journalist working on american soil, working for an american publication, and he was murdered and dismembered. this is something we can't look beyond. there has to be a consequence of that. donald trump was very much in step with the saudis. significantly, it was the first foreign country he visited as president. as well as turning a blind eye to the country's human rights record, he had a warm relationship with mohammed bin salman. when they met at a 620 summit injapan he was asked about the murder of the saudi journalist but clearly did not want it to sour their personal rapport. mr president, have you addressed the murderl of jamal khashoggi, sir? er... thank you very much, i appreciate it. under donald trump, the saudis almost had a blank cheque. those days are over. so what will this report means for the relationship between the us and saudi arabia?

here's what the us secretary of state had to say. i would say the relationship with saudi arabia is is an important one. we have significant ongoing interest, we remain committed to the defence of the kingdom. but we also want to make sure, and this is what the president is sent from the outset, that the relationship better reflects our interest and our values. so what we've done by the actions that we taken is really not to rupture the relationship but to recalibrate. agnes callamard is the un special rapporteur on extra judicial killings. she told me she hoped there would be further action taken against crown prince mohammed bin salman. at some level, of course i welcomed the report, i'm glad that the us administration and assessment is that the crown prince authorised the killing of

khashoggi. i'm glad that the 0di was able to play its role in that democratic institution of the united states were able to play their role. i am disappointed by the lack of material information and evidence included in that report, and i will be very disappointed if there is no action taken having recognise the primary role played by the crown prince. when you say lack of evidence, what would you have liked to have seen in there? well, look, the report is basically an assessment based on circumstantial information. it's mirrors very much along the lines of what i have done in my own investigation as a special reporter. looking at what we know about the kingdom and individuals

who perpetrated the killings and, you know, the logical inference from a range of information was that the crown prince was heavily implicated. i would have liked to see in that report some more material evidence, meaning information regarding a direct link between the killing and the crown prince rather than this circumstantial assessment that has been provided. so do you think more direct action should be taken against the crown prince then? absolutely. i agree with your colleague earlier, you know, 17 people have been sanctioned for and in relationship to the killing of khashoggi, some of whom did not play as important a role as the crown prince,

it is the logical implication of what was released today that the crown prince should be sanctioned, his bank account, his assets should be frozen, and in my opinion, he should also be banished from certain international diplomatic circles. i do not see how the administration will be able to escape from the logical steps that must be taken. the nigerian president muhammadu buhari has said the government will not succumb to blackmail by criminals who target innocent schoolchildren following the abduction of 317 schoolgirls from a boarding school. the kidnapping occured in the northwest state of za mfara — with its governor ordering the closure all schools statewide in response to the incident. mayenijones reports. the lucky few. these students were amongst those that were not kidnapped on friday morning.

over 100 gunmen stormed there as secondary school taking 317 students with them. security forces have been deployed to the area. that's where you'll find us on the fringes of the forest. it's part of our location allied force. as part of our coordinating efforts. anxious parents gather outside the school all day waiting for news of their loved ones. abductions of this type have become increasingly common in northern nigeria. just last week 42 people including 27 students were kidnapped in the central state of niger. they are yet to be released. in december more than 300 boys were kidnapped by gunmen and later released after negotiations. it's not clear who carried out that attack. but it was the 2014 kidnapping of 276 girls

in the town of chibok that brought mounting. that was carried out by extremist group boko haram. although they have been active in northern edge of evidence the activity could be expanding. we know that one of the major institutions by boko haram which has been operating in nigeria for over ten years is secular education. and we know that they have been infiltrating their criminal guns in the northwest. and they have succeeded in the past 18 months or so. so i wouldn't be surprised if these people are doing it for some ideological reasons or at least this indicates to us that pathological hatred they have for school presumably because they do not have opportunity of attending. encouraged by the publicity that followed by the abduction of the chibok girls.

it's an effective way of pressuring the government felt up no clear strategy to stop them northern nigeria remains one of the most unsafe places in the world for children. let's get some of the day's other news. the us presidentjoe biden is spending the day in texas, seeing how the state is recovering from a freezing winter storm which left millions without power or clean water for days. he and the first lady have visited a food bank in houston, where they helped put together supplies for distribution. they've also met staff at a coronavirus vaccination centre. a review by the united nations of global plans to cut carbon emissions suggests they won't be enough to avoid dangerous levels of climate change. the un says countries need to be more ambitious if they want to cut greenhouse gas emissions by half before 2030. more than 400 escaped from a jail in haiti during a riot that left

25 people dead. the escape took place from the prison in the suburbs of capital port—au—prince on thursday after mass violence. authorities said the prison�*s director died during the riot. one of haiti's most powerful gang leaders, areneljoseph, was among those who escaped before he was shot dead on friday. stay with us on bbc news, still to come. we'll reveal the special guest who turned up when prince harry went on american tv to talk about work, family, and leaving the royal life behind. prince charles has chosen his bride. the prince proposed to lady diana spencer three weeks ago. she accepted, she says, without hesitation. as revolutions go, this had its fair share of bullets. a climax in the night outside the gates of mr marcos' sanctuary, the name itself symbolising one of

the cruellest regimes of modern asia. the world's first clone has been produced i of an adult mammal. scientists in scotland i have produced a sheep called dolly using a cell from another sheep. i warren beatty and faye dunaway announced to the world that the winner of best film was la la land. the only trouble was it wasn't. the mistake was only put right in the middle of gushing speeches by the team behind the modern musical. not for 20 years have locusts been seen in such numbers in this part of africa. some of the swarms have been ten miles long. this is the last time the public will see this pope. very soon, for the sake of the credibility and authority of the next pope, benedict xvi will, in his own words, be hidden from the world for the rest of his life. this is bbc news, the latest headlines. a declassified us intelligence report says that the saudi

crown prince approved and likely ordered the murder of the journalist jamal khashoggi. the crown prince denies the accusation. security forces in nigeria are searching for more than three hundred girls who were abducted from a school the second such kidnapping injust over a week. there's further evidence — thanks to a study of healthcare workers in the uk that vaccines may help prevent the spread of coronavirus as well as protecting against getting ill. a study of healthcare workers in cambridge here in the uk, has found that a single dose of the pfizer vaccine dramatically cuts the risk of getting the virus without symptoms. our medical editor fergus walsh reports. like thousands of health care workers in cambridge, daniella does a weekly swab test for coronavirus before she goes to work at addenbrooke�*s hospital. it will show whether she could

be carrying the virus without displaying symptoms. that swab is analysed at these university labs, where they compared the results from staff like daniella who'd received the pfizer vaccine with those yet to be immunised. in early data, they found that two weeks after the first dose, the risk of asymptomatic infection — carrying the virus without knowing it — was reduced by 75%. an england—wide study of health workers found a similar protective effect. this is a genuine good news story. people should be really pleased that the vaccine will protect them and they should have the vaccine in order to prevent themselves and others from getting infected. i think it will help us get out of lockdown, help other countries get out of lockdown and it will allow us to get back to normal. hi, laura. can i check your blood pressure? daniella is a nursing apprentice at addenbrooke�*s.

nearly nine in ten staff here have had their first dose of vaccine — important, as it reduces their chance of getting infected and may protect patients. it makes me feel very happy knowing that i will not pass the virus to anyone around me. it's very reassuring. very reassuring. it was one of the big unknowns — can vaccines help slow transmission of coronavirus? the study here adds to growing evidence that they do. that has huge implications. it suggests vaccination benefits notjust the individual but the wider community. it's vital people have both doses of vaccine. but while highly effective, they don't offer 100% protection from catching coronavirus or passing it on. so while infection rates remain high, social distancing will continue to be important. fergus walsh, bbc news.

in the us, a committee of experts has recommended that the johnson and johnson covid jab be authorised for use. trials suggest the single shot jab is more than %85 effective in preventing severe covid disease. if the fda does approve it tomorrow it will be the third coronavirus vaccine brought into use in the us. dr. tom frieden is president and ceo of resolve to save lives. he has welcomed the reccomendation, but he says it only matters if people accept an approved vaccine when it's offered to them. what we are finding is that not only is there really good immunity after infection but many different approaches to vaccine development are working really well and that's very good. but we need to do much better in the us reaching historically underrepresented,

underserved populations and globally ramping up vaccination in countries that don't yet have access. it's too soon to say with the new variants are going to do. trends are a little puzzling. we had weather events that can delay diagnosis and result in some changes or shifts in when patients are diagnosed. but really, we do want to vaccinate as rapidly as possible. we also have to double down on protection protocols. mask up and limit the time you spend indoors with people who are not in your household. but overall, i think the news is really quite good. we are seeing very steady declines in cases and the fundamental question that is in the balance now is, will there be a fourth surge in the us? and the answer to that question lies in what we do. do we mask up, do we distance and do we prevent this from happening? this week, ten years ago, libya was in chaos. the arab uprisings of 2011 had spread there,

and colonel muammar al—gaddafi and his men were fighting back. gaddafi was eventually overthrown. the tragedy for libyans in the last ten years is that all too often the chaos has continued. they've had ten years of war, the rule of militias — and since 2014 two rival governments. the internationally recognised one in tripoli is backed by turkey. but its rival in benghazi has the support of russia, the uae and egypt. a peace process sponsored by the un is trying to unify the country with a transitional government ahead of elections. here's our middle east editorjeremy bowen. this is sirte, the place where colonel muammar gaddafi was born and where he was killed savagely, during the battle for the town after his regime collapsed. the uprisings against him

spread fast, inspired by revolution in tunisia and egypt. 0ne personjust said to me, "this is a revolution of honour, "it's a revolution of sanity." in his last major interview, gaddafi showed no sign he sensed disaster ahead. no demonstration at all in the streets. yes, i have, yes. where? i saw some today, in zawilah. are they supporting us? no, they're not supporting you. they're not against us. some were against you and some were for you. no, no one is against us. against me for what? they love me, all my people with me, they love me, all. nato air strikes against the regime gave rebels the edge. they need to stop this madness, jeremy, and you need to convey this truth. the world needs to test us, test our promises,

when we say we want peace. that was moussa ibrahim, gaddafi's spokesman, ten years ago, after civilians were killed in a nato air strike in tripoli. now in europe, he insists libya is the victim of a western conspiracy. if you come to a society, bombard it with rockets, bombs, kill many, many children, many civilians, support al-qaeda and isis and give money and weapons to violent individuals, and support them politically on the international arena and give them the loudest voices on the international media... sorry to interrupt, but they would deny all of that. they would say that is a daft conspiracy theory. we were right in describing what was happening in libya and, jeremy, you were there. everything i said to you will happen in libya has indeed happened in the last ten years. for a while there was hope.

cheering crowds in benghazi greeted david cameron and president nicolas sarkozy of france who had led nato's response. it's great to be here in free benghazi and in free libya. loud explosions. but libyans are not free. corrupt, lawless militias, and for the last six years two rival governments have fought to fill the vacuum gaddafi left when he crushed any political activity that didn't pay him homage. a lot of people said afterwards, "well, hang on, "we should have done more," whatever that means. cameron and sarkozy went to benghazi, they declared victory and went home. yeah, they did, they did. i mean, i think cameron wanted to do more. we didn't have the capacity to do it. would it have made any difference? unless you have people on the ground, and the qataris

did, the emeratis did, the turks did. we didn't. and in any case, we didn't know the terrain properly, but others did, and exploited it. in any case, we didn't know enough about libya. any more than we knew enough about iraq when we went in in 2003. thousands have been killed in libya since 2011. no one knows for certain how many. in tarhuna, they're exhuming, identifying and re—burying people murdered by a notorious militia led by five brothers. some of the dead were brought to tripoli 60 kilometres away for a mass funeral. perhaps un diplomacy can reunite the country or perhaps libya can't yet escape the power of the gun and the legacy of a dictator. jeremy bowen, bbc news. britain's prince harry says he felt forced to step back from his duties with the royal

family because press coverage was damaging his mental health. he's been speaking with the chat show host james corden, on a us television show — and our royal correspondent daneila relph was watching. here we are. this is very nice. yeah. it's the first time i've been on an open tour bus. is it really?! yeah. no! i'm not really allowed to. in the la sunshine, from the top deck of a tourist bus, prince harry opened up to his friend james corden about leaving the uk and, ultimately, royal duty. it was never walking away, it was... it was stepping back rather than stepping down. right. you know, it was a really difficult environment, as i think a lot of people saw. we all know what the british press can be like and it was destroying my mental health. really? i was like, this is toxic. yeah. so, i did what any husband and what any father would do, i was like, i need to get my family out of here. there were lighter moments, too, including a call to his wife.

haz, how's your tour of la going? - haz? i didn't know we were calling you "haz" now! no, you're not my wife, so...! james corden offered a sympathetic ear and harry was clearly at ease. he revealed that he had watched the tv series the crown, his son archie's first word was "crocodile" and there'd been a special gift from the queen. interesting, my grandmother asked us what archie wanted for christmas and meg said a waffle maker. sorry, you're glossing over the fact that i cannot for the life of me imagine the queen ordering a waffle maker! for two brits living in california there were some memories of home. there you go, a little slice of home, huh?! next weekend, it will be meghan's turn, with the broadcast of her interview with oprah winfrey. daniela relph, bbc news. don't forget you can get in touch with me and some of the team on twitter —

i'm @lukwesaburak hello, i haven't got the best weather memory but i would hazard a guess that this is going to be one of the quieter weather weekends of the year so far. that's no bad thing. barely any rain out there, some occasional sunshine, fairly chilly at night. frost, fog a possibility, but it is all very quiet with high pressure right across us, just one weak weather front moving into that area of high pressure and that just lingers with a bit of cloud as we go through the weekend, barely any rain left with it by saturday morning but the cloud will have kept temperatures up overnight and into the morning through parts of scotland and northern ireland. it's eastern scotland, more especially in england and wales with the frost, maybe down to —4 or —5 in the coldest parts of southern england in the countryside, a few fog patches, parts

of wales, west midlands and south west england could be gradually clearing. and still maybe a bit of light rain to parts of northern ireland and southern scotland but that will tend to fizzle out and bring just a bit more cloud further south into parts of northern england during the day. elsewhere, well, there will be some areas of cloud around but there will be sunny spells, too and temperatures to several degrees above the average for the end of february. still that strip of thicker cloud across parts of northern england and northern ireland, the odd spot of drizzle perhaps overnight and into sunday. away from that will be some areas of cloud, some clear spells, a few fog patches around, but not widely as clear as friday night and into saturday morning, so that means the frost isn't going to be as widespread. so just pockets of frost on sunday morning, some fog patches gradually clearing. still from that decaying weather front, a strip of thicker cloud from northern england into northern ireland, there could be a stray shower though the vast majority will have a drier day again with some cloud but also some sunny spells. and for the most part winds are light, quite breezy in north west scotland and windier towards the south coast of england

into south west england and south wales on sunday where it's likely to feel a little bit cooler and generally temperatures are just a degree or two down on sunday. now, there is a greater chance of more widespread mist and fog as monday begins and it will make for a colder day especially on monday where that fails to clear. but high pressure�*s still around for much if not all of next week. just a little weather disturbance running up across western parts on tuesday may bring a few showers, but that'll be the extent of it. and after briefly colder at the start of the week, temperatures head up again before it turns a bit colder again later in the week.

this is bbc news. the headlines: a us intelligence report says the saudi crown prince approved a plan to capture or kill the dissidentjournalist jamal khashoggi in 2018. the report said the conclusion was based on the crown prince's willingness to use violence to silence critics. saudi arabia has dismissed the american claims. the nigerian president has warned the kidnappers of more than 300 schoolgirls that his government won't give in to blackmail. he has described those behind the latest abductions, in zamfara state, as bandits and said they should not interpret government restraint as a sign of weakness. there's further evidence that covid vaccines may help prevent the spread of coronavirus. a study of healthcare workers in england has found that a single dose of the pfizer vaccine dramatically cuts the risk of getting the virus without symptoms.