the united nations has described the war in ukraine, as a "horror story of violations against civilians", and says there's growing evidence war crimes may have been committed. on saturday, it will again be attempted to establish humanitarian corridors out of the besieged southern port city of mariupol, which russian forces have been trying to fully capture for several weeks. our correspondent, catherine byaru hanga, is in southern ukraine. a warning her report contains some images viewers may find upsetting. haunting, apocalyptic scenes in mariupol. rapid explosions russia has bombarded this city into near submission. once home to about 500,000 people, thousands are believed to have been killed. emergency workers from russia are filmed here, retrieving the dead. moscow has repeatedly denied that its troops are responsible for the mass killings of civilians in ukraine, but mariupol�*s mayor says some of the worst war crimes have been committed there. translation: they | killed 20,000 people. they did it on purpose. this is what i think. they intentionally prevented people from leaving mariupol. they set this genocide up by closing the city down and using land artillery and air strikes first, and then the warships that arrived later. russian forces have been accused of hiding civilian bodies in mass graves. these satellite images show them appearing over the course of a month. the civilians have been buried in the village of manhush, outside mariupol, the southern city which has been besieged and encircled by russian forces for weeks. the last ukrainian troops in the city are holed up inside the azovstal steelworks, on mariupol�*s coast. 1,000 civilians are still said to be in this sprawling industrial complex. on this missing persons wall, most of the faces and names that you can see are people from mariupol, and now, with the ongoing blockade and with communications cut off, it's almost a miracle for people to get out. these three women escaped mariupol together on thursday — just a handful of people who made it through with a humanitarian convoy. a friendship born out of the horrors of this war. translation: people are risking their lives under fire. _ they have to because there is no running water, gas or electricity. there is a mosque in the prymorskyi district with a well nearby. a lot of people got killed there. they got caught up in shelling. they were just looking for water in the city. but they are safe now and able to rebuild their lives in new cities and countries. catherine byaruhanga, bbc news, zaporizhzhia. the ukrainian deputy prime minister has told the bbc only the un can save the lives of tens of thousands of people stuck in the besieged city of mariupol. lets get more on developments on the situation. keeping an eye on things is our reporter, azadeh moshiri. what is the latest eye on things is our reporter, azadeh moshiri. what is the latest on eye on things is our reporter, azadeh moshiri. what is the latest on these eye on things is our reporter, azadeh moshiri. what is the latest on these evacuations, they don't always happen, from russia. the latest is that ukraine says they are working on a humanitarian corridor, from early times saturday, to get some of these tens of thousands out of mariupol into relative safety, but the problem is these humanitarian corridors have been attempted in the past. it is simply so difficult for these aid agencies to get to mariupol, pass these russian checkpoints, past the shelling. a lot of the time, mariupol residents are fleeing on their own without the help. this is why iryna vereshchuk was quite biting in her criticism of the un on, saying they had just been watching on. and she said antonio guterres needs to intervene to help people trapped in mariupol. and as we know, he is heading to moscow. he and as we know, he is heading to moscow— and as we know, he is heading to moscow. he may or may not have talks — to moscow. he may or may not have talks with _ to moscow. he may or may not have talks with president - have talks with president putin, he will also have talks in ukraine. it does seem that the un role now is saving lives through humanitarian corridors and aid, rather than stopping the war, but the pressure is on, isn't it? the war, but the pressure is on. isn't it?— the war, but the pressure is on, isn't it? yes, and this is why they — on, isn't it? yes, and this is why they have _ on, isn't it? yes, and this is why they have made - on, isn't it? yes, and this is why they have made this . why they have made this announcement, partly, these trips. he will be meeting with sergei lavrov, and it is said he will meet with putin, but it is unknown if he will have any substantive discussions with him. later, he will meet with president zelensky in kyiv. it is said this is an effort to bring about peace in ukraine. he has also said he will meet with you and aid workers on the ground in ukraine so that they cannot scale up the humanitarian assistance, because they have warned that so far there have been a lot of tremendous barriers in delivering essential aid, things like food and water. we have been _ things like food and water. we have been hearing more from russia in the past hour, this is about their ship the moskva, a hugely important ship in theirfleet, it sank, it was claimed that an neptune missile boarded down, russia denies that. what have them and saying about the moskva in the past hour? they have said that one person died, 27 missing, and they have managed to rescue almost 400 people. the bbc has not been able to verify those numbers but it is a big omission from russia, because so far they hadn't admitted to any casualties. that was partly, as you said, the moskva was the flagship of the black sea fleet, so it was seen as a very big moment in the war. ukraine is certainly touting it as a significant one. and even if russia says it was sunk because of a fire on—board it hasn't stopped ukraine from calling the ship a ukrainian underwater cultural heritage site. many thanks for that update on ukraine. campaigning has ended in france ahead of what's expected to be a close run—off between president emmanuel macron, and his far—right rival, marine le pen, on sunday. opinion polls suggest emmanuel macron still has the upper hand, but his challenger could perform better than she did when the pair went head to head in 2017. our paris correspondent lucy williamson reports. it's a bit late for tips on how to learn to punch on his opponent. after five divisive years in power, what emmanuel macron needs is to persuade voters who'd quite like to punch him to give him their vote instead. florentine and chloe are both teachers here in the suburbs of paris. they voted for mr macron last time. now, they've come to give him a hard time. le pen isjust...huge disaster, but macron is still a disaster, i think, for school and service—public, ah, public services in france. he's killing that, step—by—step. florentine says she'll abstain on sunday rather than vote for macron again. i'm still hesitating. i think if i do it, i might really get sick just after. he's a good talker, he knows how to try to seduce people, but we're not stupid. chloe gets close enough to shout her question on teacher's pay. "do you think teachers are lazy?", she asks. through the scrum, macron grips her hand, and locks in her vote. translation: he gripped my hand and said, "we're going to do - "something about that, i promise." so, i will vote for him, but i want something in return. truck horn honks there's a real choice on sunday about where france is heading. marine le pen is promising huge tax cuts and to "take back control". emmanuel macron wants a global nation, set on economic reform. divisions here are deepening with every election cycle and voters are now split between two radically different views of the world — with one candidate presenting herself as the spokeswoman of the people, and the other saying he's protecting france from her. dylan says he voted far—left in the first round of this election. on sunday, he's voting far—right. translation: it's not that i like the idea of voting - for marine le pen, but we have to choose between the two, and when you're choosing between cholera and the plague, you choose the lesser of two evils. crowd chanting at herfinal rally, here in arras, marine le pen said voters should choose her to block mr macron. both say the other is dangerous. both spark loyalty in their own fans and loathing in those of their rival. but most voters belong to neither camp, and in this battle over france's future, they're being asked to choose a side. lucy williamson, bbc news, paris. voting takes place on sunday in france, and whether you're watching in the uk or around the world we will have a special programme bringing you the result, starting at 1730 gmt. join us for that, as france decides. florida's governor has signed a law that eliminates disney's right to act as a local government in orlando, where it has its theme park. the move by ron desantis comes after disney criticised the state's ban on sexual orientitation teaching in schools. the special status allowed the entertainment giant to collect taxes and guarantee essential public services such as rubbish collection and water treatment over a 100 square kilometre area near disney world. the uk and india have signed a new defence partnership. the agreement was made as borisjohnson continues his visit to india, where he's been meeting his counterpart narendra modi. the bbc�*s ben wright sent this report from delhi. the sun shone, the soldiers saluted and the ceremony never flagged. it was the red carpet treatment for boris johnson, who was here for talks with his indian counterpart, narendra modi. after yesterday's torrid day of political turmoil at home, mrjohnson seemed pleased to bask in the welcome. a joyful reception, i wouldn't get that necessarily anywhere in england. this is when the visit got down to business. it's 75 years since india gained independence from britain, and both countries say a free trade deal can be signed this year to mark the moment. next week, we're telling our negotiators, get it done by diwali in october. they had a long discussion about ukraine. india has held a neutral position on russia's invasion, and borisjohnson did not come here to jab or pressure, but mr modi did call for peace. translation: we emphasised on an immediate ceasefire - in ukraine, and on the use of dialogue and diplomacy for resolving issues. while borisjohnson later confirmed the uk intended to deepen its military commitment to the crisis. so, we're looking at sending tanks to poland. that's to allow warsaw to send its tanks to ukraine, and the prime minister also said british diplomats would soon be returning to the capital. i can announce today that we will very shortly, next week, reopen our embassy in ukraine's capital city. it's been a difficult couple of days for the prime minister, who's now facing an inquiry by mps into whether he misled parliament. you said there'll be a free trade agreement with india by diwali, but considering the number of party investigations going on back home, are you absolutely sure you'll still be prime minister then? ok, the second answer is yes, but... all trade agreements are tricky, ben, to get to your point about trade, and there will be tough asks of both sides, but i'm sure we can do it. boris johnson bristles at any mention of parties and the political problems he faces back at westminster. he is clearly irritated that it's taken the focus away from his efforts to deepen britain's ties with this surging economy. but it's where the party saga goes next that could determine boris johnson's future, as he returns to domestic political strife. ben wright, bbc news, delhi. this is bbc news — a reminder of our headlines: the un describes the war in ukraine as a �*horror story of violations against civilians' and says there's growing evidence of possible war crimes. the satellite company maxar has released new images of a possible second mass grave site near mariupol. the firm says the cemetary location has got bigger over the past month and has several long trenches which may suggest a new burial site, but how do you verify such a claim. earlier i spoke to malachy browne who is a senior story producer on the visual investigations team at the new york times. i asked him for this thoughts about these new satellite images. in this case the satellite images came from maxar but they were also reported by radio free europe from a second company called planet and these are trenchers that are dug in an existing cemetery. you can tell that they are trenchers because you can see the shadow cast by the wall of the trench into the ground about 40 metres long, it starts to be dug around the end of march, the last week of march and in the first couple of weeks in april it has doubled in size and you can see that in the fresh earth that has been overturned. you can also see that it appears that the early trenchers at one side of the new burial site have been filled in because those shadows no longer exist whereas they do on fresh ground, suggesting that early trenchers are filled and they are digging new ones, presumably to bring more bodies. ~ ., ., bodies. we are looking at some ofthe bodies. we are looking at some of the satellite _ bodies. we are looking at some of the satellite images - bodies. we are looking at some of the satellite images we - bodies. we are looking at some of the satellite images we are l of the satellite images we are talking about now, i know you haven't been working particularly on these images but do you think these will become crucially important as the un and other investigators try to gather solid evidence of possible war crimes? hoe? possible war crimes? how helful possible war crimes? how helpful our _ possible war crimes? how helpful our satellite - possible war crimes? fiche" helpful our satellite images? the satellite images indicate that there is a high death toll and that is consistent with what also we are hearing from officials there and the meagre information we are getting. this particular neighbourhood on the outskirts of mariupol was the scene of heavy fighting during rush's approach. we were keeping an eye on it and in fact we saw multiple rocket launchers in that area in march and i think mariupol is a bit like bucha and the other towns that are occupied by russia, if russia leaves it will become accessible. i'd read to think what we will find when we get access to the city.— access to the city. and you have worked _ access to the city. and you have worked extensively . access to the city. and you l have worked extensively on bucha and the claims of a massacre that which russia denies. what is your assessment of the evidence that you have seenin of the evidence that you have seen in your work? the satellite _ seen in your work? the satellite images - seen in your work? the satellite images show i seen in your work? the | satellite images show in seen in your work? tue: satellite images show in bucha that the bodies that were found when ukrainian officials and journalist finally got access to it were in those positions on the street for weeks while russia was in control of the town. that was contradicted directly by russians saying that these bodies appeared after our soldiers left. we found video then afterwards that showed russian armoured personnel carrier firing at a civilian who rounded a corner on a bicycle. at that same intersection. so not only was russia in control of the town but they had a convoy of 20 or more military vehicles at that intersection where many bodies were found and our reporters on the ground have been speaking to witnesses in weeks since and they are hearing stories of executions in bucha by russian soldiers. the mexican authorities have been criticised for not doing enough to tackle femicide — the murder of women because of their gender. more than 150 women have been killed in the first two months of this year alone, and around 25,000 women are missing nationally. among the disappeared is debanhi escobar, an 18—year—old law student who has been missing since april nine. ana maria salazar is a former us deputy assistant secretary of defense for drug enforcement and security policy, and is based in mexico city. she said the authorities face a broader crisis of violence. well, because they have a different view in terms of how to deal with violence in mexico. i mean, there is a big question mark — how do you deal with criminal organisations who are among the most dangerous criminal organisations in the world, at the same time you have an enormous amount of violence that don't necessarily have to do with organised crime. so the problem is, what strategy are they going to use, and they have decided that the best way to deal with violence in mexico is through these development programmes, providing scholarships, providing funds, trying to improve the lot of the poorest of the poor. which is — it needs to be done, mind you, it has to be done, but as you provide this money to the poorest of the poor and these scholarships, it doesn't necessarily mean you are going to solve the problem of violence. and the fact is we are going through, in mexico right now, one of the highest index of violence, homicides, in the world. and like i said, you are absolutely right, it is shocking, mexico is about to reach 100,000 people disappeared in the last 40 years. so we have people who are being, who have disappeared, 20,000 in the last three years. we have an enormous amount of violence against women, murders against women have skyrocketed, and we continue to have to deal with these extremely dangerous criminal organisations. it is the oldest and most prestigious exhibition in the western art world, the venice art biennale opens on saturday. this year — it's happening against the backdrop of the war in ukraine. our culture editor, katie razzall met ukrainian and russian artists in venice. serene venice has been shaken by world events. first, its international art show was delayed a year by covid. now, that biennale is taking place in the shadow of war. all of which means, unusually, the art world is focused on ukraine. there is a new damien hirst for a show, defending freedom. and works by maria prymachenko, who is a symbol of the country's national identity. it's about showcasing ukrainian culture. one artist depicts her husband and others who havejoined the army, painted as reports of war crimes against civilians in the kyiv suburb bucha were revealed. and i was even crying because of bucha, and this canvas was laying on the floor and i thought, ok, ironically, connect, you know, because of the... ..wetness of the painting is connected to my tears. russia's pavilion is shut. the artists and curator behind this year's show pulled out when the invasion happened. the only thing to see was an anti—war protest by a russian artist. applause he was surrounded by supporters, and then swiftly by police. he's a sole voice of protest but he does speak for many russian artists, and this russian pavilion is closed — and, in a sense, those closed doors symbolise quite how isolated russia is. but some russian art is being shown at the bienniale, including tapestries by zhenya machneva. it's screaming, it's crying. all my feelings is here. zhenya opposes the war. we should stop it. and every day i want that it stops, but it's hard to face, that each day it's getting worse. the ukrainian pavilion is now centre stage in venice. the artist behind this work, called the fountain of exhaustion, says it is important that his country is represented here, because the russians are attacking notjust ukraine but its culture. they want to level and demolish totally ukrainian culture because it