this is bbc world news today. our top stories... police in northern ireland arrest two men in connection with the killing of the journalist lyra mckee. french police fire tear gas during the latest anti—government yellow vests protests in paris. a democratic 2020 presidential this is bbc world news today. contender calls for the start of impeachment proceedings against president trump. hello and welcome to world news today. the detective leading the investigation into the killing of lyra mckee in northern ireland, has warned a "new breed of terrorists is coming through the ranks". two teenagers have been arrested

by officers who suspect they were involved in shooting dead the young journalist in londonderry. police say they believe the dissident republican group the new ira is behind the killing. the teenagers are being questioned in belfast, from where louise cullen sent this report. a journalist, campaigner, beloved partner and devoted daughter. the police today said they'd met lyra mckee‘s family, to try to answer their questions and they said the killing had united the community against the dissidents. my broader concern is that what we're seeing is a new breed of terrorists coming through the ranks. and that, for me, is a very worrying situation. there is a real sense that what happened to lyra marked a sea change and i want people to have confidence to come forward. the police were carrying out a search operation targeting dissident republicans in the creggan area of derry on thursday night when rioting flared. in cctv footage, a masked man steps out from behind a wall.

he disappears, then a few minutes later, a man with a gun fires shots towards police and onlookers. lyra mckee was rushed to hospital, where she died from her injuries. the police believe a group calling itself the new ira was behind the murder. one of the things that's worrying about this organisation is that they do have people who were experienced in the dark arts of bomb—making, when they were in the provisional ira, and some of those people have gone over to the new ira in the last decade or so. for friends of the journalist and lgbt activist, reality is just beginning to sink in. when i woke up this morning, i did think that i dreamt all this, it hadn't really happened. i'd dreamt the vigil, i'd dreamt everything and then i heard the news and i realised it wasn't some awful nightmare, it was true. and people across northern ireland are standing with lyra's friends and family, with books of condolence being signed and vigils held in a number of towns and cities. everybody should show their condemnation of this murder in some shape or form.

we need to move forward. nobody wants to go back to those dark days, and that our children deserve the opportunity to never be brought up in that, the way we all were. the killing of a ceasefire baby has brought the community together to stand against that possibility. louise cullen reporing there. let's take a look at some of the other stories making the news... an attack on the communications ministry in the afghan capital kabul killed seven people — including three police officers. the attack is now over and a government spokesman said all the gunmen had been killed. hundreds were evacuated from the city centre after the attackers stormed the building, setting off an explosion at its boundary wall. the taliban has denied responsibility for the attack. heavy clashes have broken out south of the libyan capital tripoli. it's after soldiers loyal to the un—backed government launched a counter—offensive against general khalifa haftar‘s forces. residents in the city centre said heavy gunfire and shelling could be heard. more than two hundred people have

died since general haftar began trying to capture tripoli two weeks ago. in sudan, the country's public prosecutor has begun an investigation into former president omar al bashir on charges of money laundering. millions of dollars in cash was reportedly discovered stashed away in his home in sacks of grain. al—bashir was ousted from power last month following months of protests and a military coup. clashes have broken out between demonstrators and police in paris, on the twenty—third saturday of ‘yellow vest‘ protests. officers have fired tear gas and nearly two hundred people — in the latest anti—government rally. the protesters have been banned from the area around the champs elysees and the burnt notre dame cathedral. our europe regional editor, danny aeberhard, reports. it's week 23 of the yellow vest

protests a nd it's week 23 of the yellow vest protests and the first since the catastrophic fire at notre dame cathedral. if the authorities hope that heralded unity they were wrong. political tensions continue to smoulder and opting into clashes on the streets of paris. a group of protesters set motorbikes alight in one area. the violence was nothing like the scale of the riots in december. one protester said radical elements had hijacked a mostly peaceful demonstration. you can see there are people who are not necessarily hear out of the same convictions we have for peaceful reasons. we should be able to move around everywhere but it is true at is not very pleasant doing this. we cannot protest as we would like so it is getting tense. i get remains. some was directed against the $1 billion raised to restore notre

dame. demonstrators have criticised the ees with which billionaires and corporations have funded huge donations for the fire damage cathedral rather than alleviate poverty. the fire and its aftermath temporarily displaced the yellow vests from centre stage. it broke out moments before a televised address from the president emmanuel macron. he was forced to postpone the speech to outline measures the government would take. the so—called great debate had provided citizens with a space to air their grievances. the president is never expected to address the issue on thursday. —— nowi expected to address the issue on thursday. —— now i expected to address the issue. police in london have reopened one of the busiest intersections in the city centre which had been blocked by climate change protesters for nearly a week. oxford circus was one of several locations which had been occupied. the police have denied that they have carried out so many

arrests that they have run out of room at police stations. jon donnison reports. the extinction rebellion has life in it yet. for a sixth day, climate change protesters targeted central london. yesterday's pink boat at oxford circus was replaced by a green hammock. their message: they're not going away. if there were a better way, please somebody tell us because we've tried the suggested ways. we've tried writing to mps, we've tried doing petitions, we've tried just standing in the street with banners. it clearly hasn't worked. cheering. she was eventually arrested, as were others, but they're not making it easy for the police. some protesters had glued themselves together, with their arms encased with piping. a cheer goes up now as one protester has been released. here at oxford circus, the police are using bolt cutters, angle grinders and special chemicals

to break through the glue that protesters have used to stick themselves together. cheering. there were similar scenes at waterloo bridge. we were here to protect our kids and to protect our future kids and their future kids. you don't have to understand science to understand that. the metropolitan police have had to request 200 extra officers from neighbouring forces, but deny they're struggling to cope or that cells are full. it's been a really challenging operation. they're using very dynamic communications and very dynamic tactics. i think many people would say we haven't seen anything quite like this in this city or around the country before. by late afternoon, the last of the protesters at oxford circus had been removed and traffic was flowing again, but the demonstrators insist they'll be back. jon donnison, bbc news, in central london.

the us senator elizabeth warren has become the first major contender for the democratic 2020 presidential nomination to call for the start of impeachment proceedings against president trump. her call comes after the publication of robert mueller‘s report into russian interference in the 2016 election. mr mueller did not make a conclusion about whether the president unlawfully obstructed justice, but did outline nearly ten instances where trump had attempted to stop or limit the inquiry. ten different episodes of the president trying to block an investigation into an attack on the united states by a hostile foreign government and an investigation into his own role. the constitution says when the president engages in this kind of activity then it is time for

impeachment. let's get more from our correspondent in washington, chris buckler. this is interesting given that a couple of other democratic members of congress said it was too early for impeachment and far better to leave it until the election. when you look at what the democrats are in during the trying to work out a strategy. they have funded through this report which may have been redacted but they have found evidence of a president behaving unusually and subtly on the fringes of criminality. they would argue he was at times trying to obstruct justice and that is the conclusion of with one who is trying to get impeachment proceedings started. it is likely they could get impeachment proceedings began because they have a majority in the house of representatives but it would be

difficult to take it to the next age because the impeachment begins there but the decision about impeachment is made in the senate and they are at the republicans have the majority of the democrats simply would not have the numbers to carry it through. it would also take all of the focus on politics in washington towards those very proceedings whenever we have a campaign that is just about to begin for the 2020 presidential election. there are risks in all of this not least because there are voters here who are sick to death of hearing about the cr1 report and they believe many of them have already made the decision. republicans and democrats are deeply split and those who leave donald trump did nothing wrong and those who believe he definitely did. republicans possibly will say why the stock of impeachment when the report came back and found there was

no collusion with russia during the campaign. it is the other issue of obstruction of justice, campaign. it is the other issue of obstruction ofjustice, whether the president was involved in that and although the attorney general seems to clear donald trump, there are lots of questions after reading this report about the president's behaviour and i think it is true that even some republicans see that although most of them the vast majority are affording and behind the president, there is one exception which is senator mitt romney has been a critic of donald trump who is an influential republican who said having read this iam republican who said having read this i am second at the extent of pervasiveness of the sanity and misdirection by individuals in the highest office of the land including the president. egyptians are voting in a three—day referendum on changes to the constitution that would give more power to president abdul fattah al—sisi.

the amendments extend mr sisi's term from four to six years, and allow him to stand for a third term — meaning he could remain in office until 2030. they also grant him wide control over judicial appointments and strengthen the role of the military. mr sisi's government has crushed opposition since he took power in 2013 and opponents of these measures have been unable to organise a serious campaign. bbc arabic‘s ranyah sabry is in the egyptian capital cairo. she explained how people there have been reacting. for the time being from what we have been seeing on tv stations the number of people outside the voting polls is much larger than all those entering. it is a smooth process so far, everybody voting are not centrally connected meaning somebody would give their vote at one place and sign their name and the id card, there are no central guarantees he could not go and sign elsewhere. so far the operation has been quite

smooth, the turnout has been low, at the last referendum only 36% turned out to the polling stations. we still have about 72 hours to go cup sunday and monday the will still be voting and the result is expected monday evening. ajapanese man has become the first blind person to sail a yacht across the pacific ocean. mitsuhiro iwamoto set off on his non—stop voyage from san diego on the californian coast at the end of february. he was accompanied by a sighted american sailor doug smith who gave him information from visual sources while mr iwamoto steered the vessel and managed the sail. almost two months on, the sailor was greeted by an ecstatic crowd in the japanese port of iwaki in japan earlier today.

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