Image source, Reuters

If you're just joining us, or want a recap, here are today's main headlines from the war in Ukraine:

• In the Ukrainian capital Kyiv, eight people have been reported dead after a shopping centre and a number of houses were shelled in the Podilskyi district
• The mayor of Kyiv has announced a curfew in the city from 2000 local time on Monday to 0700 local time on Wednesday
• Ukraine's President Volodymyr Zelensky has accused Russia of war crimes in the besieged port city of Mariupol, where heavy fighting has now reached the city centre
• The dire situation in Mariupol continues, with some 300,000 people trapped without power, food or water amid intense bombardment and an estimated 90% of buildings have been destroyed
• But Ukraine has ignored Russia's demand it should give up the city, saying there is "no question of any surrender"
• The Moscow stock exchange has reopened for the first time since the day after the invasion began - but the Russian capital's residents are facing a food shortage and rising costs as sanctions bite
• Downing Street says it believes the Kremlin was behind hoax calls made to UK ministers last week

Russian troops have dispersed a demonstration in the occupied southern city of Kherson by firing on protesters, media reports say.

Video footage has appeared on social media showing the protesters on a city square, with people running and the sound of automatic gunfire.

Some reports say stun grenades were also used.

Several people are reported to have been injured.

The city has seen regular protests against the occupation since Russian troops took over at the beginning of March.

It is the largest of only a handful of cities captured by Russian forces since the invasion last month.

Image source, Reuters

As we've been reporting, the latest attempts to agree a humanitarian corridor out of the blockaded city of Mariupol have failed, and the plight of thousands of trapped residents looks set to continue.

Roman Skliarof, who left the southern port city in the first week of the war, says he had to leave his grandmother behind because she refused to abandon her home, and that he is now unable to contact her.

"It's not possible because there is no electricity [or] mobile service, we try every day to make a connection, but it's impossible," he says.

Roman says he has tried to reach her and others through volunteers or people outside Mariupol.

"We hope after all this is finished, we will come back to save her."

Image source, Reuters

Another resident, Anastasiya, told the BBC she managed to escape the city three days - by hitchhiking with a family.

"There was a guy who was leaving with his family… they took us - we said we don't care where we go, we just need to be out."

She said they had to pass Russian checkpoints, where their phones were checked and men were asked to undress.

Describing the city she left behind, she said: "They started bombing our district and it was horrific, we were hiding in our apartment, it was impossible to go out.

"First it was the heating, then electricity, water, internet... shops raised their prices, it was impossible to find bread.

"After that people started looting and they destroyed shops completely."

Image source, Getty Images

Downing Street has publicly blamed the Kremlin for being behind hoax calls targeting British ministers.

Defence Secretary Ben Wallace and Home Secretary Priti Patel said they had been targeted by calls from imposters last week while No 10 revealed an unsuccessful attempt was also made to contact Culture Secretary Nadine Dorries.

The prime minister's official spokesman said: "The Russian state was responsible for the hoax telephone calls made to UK ministers last week.

"This is standard practice for Russian information operations and disinformation is a tactic straight from the Kremlin playbook to try to distract from their illegal activities in Ukraine and the human rights abuses being committed there.

"We are seeing a string of distraction stories and outright lies from the Kremlin, reflecting Putin's desperation as he seeks to hide the scale of the conflict and Russia's failings on the battlefield."

Wallace had previously said he believed Russia was behind a call he received, claiming to be from the Ukrainian PM, but this is the first time the UK Government has directly blamed Vladimir Putin's administration.

Senior Westminster sources fear the Russians may attempt to doctor footage obtained in the calls in an attempt to embarrass the UK.

BBC Newshour
BBC World Service

Russia isn't serious about peace talks, Ukrainian President Zelensky's adviser has told the BBC's Newshour.

Alexander Rodnyansky says talks aim to "trap the West into thinking further sanctions aren't necessary".

"They've been using these talks as a way to distract attention from what's happening on the battlefield", he adds.

"You don't look for peace and bombard cities on a large scale at the same time."

Ukrainian authorities say at least eight people were killed by shelling that destroyed a shopping centre in the Podilskyi district of the capital, Kyiv.

Video released by Ukraine's State Emergency Service captured the moment the centre was struck, causing a huge explosion followed by a large ball of flames.

The force of the blast shattered the windows of a neighbouring high-rise block.

Firefighters were later seen trying to reach people stranded beneath rubble at the site. Several floors of the 10-storey building remained ablaze for hours after the attack.

Some survivors nearby said they had to scramble for cover while others said they were fortunate to have been sleeping "between two walls" in their hallways to protect themselves from any possible attack, Reuters news agency reports.

The BBC's James Waterhouse, who is in Kyiv about eight miles (13km) south of the Podilskyi district, said he heard a series of very loud bangs overnight.

Our correspondent described being met with "a wall of energy" as wind hit the side of his building and its windows.

Image source, EPA

We're getting more reports about rationing of some staple foods in Russia. There has been particular demand for sugar.

In the far eastern Maritime Region, supermarkets have imposed limits of 2kg per customer for sugar, flour, rice, buckwheat, salt and macaroni; 2L of vegetable oil and three jars of baby food. The rationing was reported by Russia’s business daily Kommersant.

In Khabarovsk, a city in that region, there has been panic-buying of sugar, and it has disappeared from many supermarket shelves, a local news agency reports.

However, deputy industry and trade minister Viktor Yevtukhov insists “there is no problem with sugar”, as Russia produces enough for itself and has banned sugar exports.

The St Petersburg supermarket chain Vkuster told Kommersant that it was also limiting sugar sales to 2kg per customer. “When one customer fills a whole basket with bags of sugar, others look at him and think about stockpiling too,” said Vkuster director Sergei Plis.

Last week the national statistics service Rosstat said sugar prices had jumped nearly 13%.

Sanctions imposed over Russia’s invasion of Ukraine have severely weakened the rouble and fuelled inflation, pushing up food prices.

Image source, EPA

The biggest concern for Russian people currently is the shortage of food supplies in their local supermarkets - and the rising cost of the goods still available, reports the BBC's Steve Rosenberg.

"Sugar has disappeared from a lot of supermarket shelves," Rosenberg tells BBC Radio 4 - with a Russian newspaper today writing about a "sugar panic" among the public.

He said that there was no sugar in his local Moscow supermarket when he visited on Sunday, and the shop "had introduced quite a few restrictions on food items to prevent panic-buying".

Salt and cooking oil are among the everyday food items being rationed.

Rosenberg said the Russian media continued to create "an alternative reality" with its coverage of the invasion of Ukraine, which they refer to as a "special military operation".

"The Kremlin wants Russians to believe Russia is under attack from Fascist and Nazis - aided by Western aggressors - and that Moscow has truth and justice and good on its side, and will fight to destroy evil," he told the Today programme.

Ukrainian Deputy PM Iryna Vereshchuk has said the assault on Mariupol is personal for Russian President Vladimir Putin - because he failed to capture the city in 2014 at the time when Russia annexed the Crimean peninsula from Ukraine.

"I think Putin is wreaking personal revenge on the people of Mariupol, after his failure to take over the city in 2014. It's collective punishment for their refusal of Russian tutelage," she told French newspaper Libération, external (in French).

Vereshchuk said efforts to reach the south-eastern city with humanitarian supplies continue to fail.

"If Putin wanted it, the Mariupol humanitarian corridor would already be open. The Russians are destroying the hospitals, the theatre which housed displaced people, [...] the mosque, the churches, nothing stops them."

At least 300,000 people are thought to be still trapped inside the besieged city without power, food or water amid intense bombardment.

Image source, AFP

The head of news on Russia’s main state TV channel has condemned as “treachery” the anti-war protest by editor Marina Ovsyannikova, who interrupted a live news bulletin.

Ovsyannikova ran onto the set on 14 March with a placard saying “no war” and was later detained and fined 30,000 roubles (£219; $288).

Speaking on Channel One, head of news Kirill Kleymenov said “an emotional outburst is one thing, but treachery is quite another matter”.

Ovsyannikova’s message told viewers that they were being told lies about the war in Ukraine. There was huge global interest in her protest.

Kleymenov alleged that shortly before her protest Ovsyannikova “according to our information, spoke to the British embassy”. He also said her lawyer had turned up at the TV studios, and it was "a planned action".

She has made no mention of any contact with the British embassy.

He said the journalist had “betrayed all of us… coldly, duplicitously, for a bonus”.

Image source, Reuters

We told you earlier how more than 2.1 million people have fled Ukraine for Poland over the past three weeks, since the Russian invasion began.

Numbers crossing the border are beginning to ease, with some refugees moving on to other parts of Europe, such as Germany.

It comes as Poland, and specifically the transport hub city of Krakow, is struggling to find space for everyone, with accommodation in the city running out.

Daria, a Ukrainian volunteer working at Krakow station, told the BBC it was "a big problem trying to find places for everyone" and it meant some people were now being sent to small cities and towns outside the region, sometimes reluctantly.

"Sometimes it's very hard for them to move," Daria told the BBC's Dan Johnson. "People come here, they are very shocked - they have no idea what they are going to do with their lives."

But she said Poland continued to provide free accommodation, free food and lots of support to the weary refugees.

"We are doing all we can to help them."

Kyiv was hit by a number of large explosions late on Sunday, which included strikes on several houses and a shopping centre in the north-west of the city.

Image source, AFP

Image source, AFP

Image source, Getty Images

Image source, Getty

Image source, Getty Images

Joel Gunter
BBC News, Lviv

There was no family around Dmytro Kotenko when they put him in the ground.

His parents did not hear the gunshots that rang out over his grave. They did not hear the sound of the ribbon tied to the wooden cross above him as it fluttered in the wind.

Kotenko's parents were 600 miles (960km) away, in Sumy, unaware their son was being buried that day in Lviv.

Some of Ukraine's fallen soldiers cannot be taken home because Russia is shelling their cities and towns, and their families cannot come to the graveside because they are trapped under the shelling.

On the day Kotenko was buried, there was one familiar face at the cemetery - his school friend Vadym Yarovenko, who was stationed in Lviv.

"I watched my friend being buried far from his home," Yarovenko said.

Read the full story here.

Image source, David Beckham

Former England football captain David Beckham yesterday handed control of his Instagram account to a Ukrainian doctor in the city of Kharkiv.

Dr Iryna, head of a regional perinatal centre, has posted videos about the work medical professionals are doing in the city, which has been the target of Russian shelling for more than three weeks.

Footage shows newborns being treated, and a basement where patients have had to be moved to escape the shelling.

Beckham, 46, has more than 71 million followers on Instagram.

Dr Iryna, who as well as running the centre, serves as a paediatric anaesthesiologist, said: "The first days were the most difficult. We had to learn how to work with bombings and strikes.

"We are probably risking our lives but we don't think about it at all. We love our work. Doctors and nurses here, we worry, we cry, but none of us will give up."

• Read more on this story here

Image source, Getty Images

The stock exchange in Moscow has partially reopened for the first time since 25 February - the day after the war began.

Trading of bonds and shares on Russia's financial markets was suspended after stocks plunged by 33%.

International sanctions are being felt in the wider economy, with some supermarkets rationing sales of basic goods such as salt and cooking oil.

The market reopened at 13:00 (10:00 GMT) only for some loan bonds issued by the Russian government.

In pre-market trading, yields on government bonds rose by almost 20% - the highest on record - before falling back a little. A higher yield means the government will have to pay more to borrow and indicates the investment is more risky.

Separately, the a US dollar was valued at 105 Russian roubles. It's down by about a quarter since the start of the invasion.

Swetha Ramachandran, investment manager at Gam investments, tells the BBC the impact of bond sales will be felt by local Russians following weeks of practically no overseas investment.

"The Central Bank is expected to step in quite aggressively to buy local federal bonds to support the ailing market and economy," she says.

If you are just catching up with the morning headlines, here's a short summary of what is going on in Ukraine today.

• The dire situation in the port city of Mariupol continues, with some 300,000 people trapped without power, food or water amid intense bombardment
• Ukraine has ignored Russia's demand it gives up the city by 05:00 Moscow time, saying Russian promises to allow people out of the siege could not be trusted
• A Ukrainian MP from Mariupol says Russia is trying to starve out the citizens, but the city will not surrender
• Ukrainian authorities say at least six people were killed when a shopping centre and a number of houses were hit in the Podilskyi district of Kyiv
• People are being advised to shelter after a 50-tonne tank containing poison gas was damaged during shelling of a chemical plant near the city of Sumy, causing a toxic ammonia leak
• The mayor of Kyiv has announced a curfew in the capital from 2000 local time on Monday to 0700 local time on Wednesday
• Lithuania’s foreign minister says the EU must maintain pressure on Russia and "cannot get tired" of imposing sanctions

Footage posted online appears to show Ukrainian civilians in the southern city of Kherson making a Russian truck reverse away from their protest on Sunday.

The reversing vehicle was marked with the letter "Z", which has become a symbol of support for Russia's invasion of Ukraine.

The BBC has verified and geolocated this footage, but the source is unknown.

Dr Jack Watling, research fellow for land warfare at the London-based defence think tank, the Royal United Services Institute, gives us an overview of what military analysts say is happening in the Ukraine campaign and the meaning of the phrase being used about the Russian military reaching "culmination point".

"As military forces advance, they obviously burn through fuel, ammunitions, supplies...

"And while they have lots of supplies with them, they can keep advancing, but you hit a point where you're having to wait for the supplies to arrive.

"And then each shipment of supplies that gets to you is only a limited amount, so you can only get a certain bit further," he explains on BBC Radio 4's Today programme.

"The tempo of operations slows down. So what we're seeing now is a transition from where the Russians were resourcing multiple axis of advance into Ukraine and now they're having to concentrate that resource on to one axis at a time.

"They're starting to dig positions around Kyiv; they're going firm around Kharkiv; and Mariupol is the main effort at the moment. Now if Mariupol falls, then they can shift that main effort somewhere else.

"So I think what we're going to see is a much more sequential campaign from the Russians."

He adds the Russians will try to isolate each objective in turn, starve out a city and then move on to the next one. He says the war is moving into a much slower period.

A new curfew has been announced for the Ukrainian capital Kyiv.

The curfew will be in place from 20:00 (18:00 GMT) today until 07:00 (05:00 GMT) on Wednesday, the city's mayor, Vitali Klitschko, wrote on the messaging app Telegram.

"I ask everyone to stay at home - or in shelters when the alarm sounds," he said.

Russian President Vladimir Putin is a "compulsive liar", UK Health Secretary Sajid Javid says.

He told BBC Radio 4's Today programme the West must "be realistic about where things are heading at this point in time", noting Russia's military strength.

"I fear, that without finding some way to constrain Russia and Putin at this point, things are going to get a lot uglier.

"The Russians don't seem that they can be trusted, and especially President Putin, who we know is a compulsive liar. We know that he has difficulty in separating fiction from fact.

"I know from my own experiences as home secretary... when we were dealing with the attack on Salisbury with an illegal chemical weapon... that the Russians lied all the way through it."

On UK PM Boris Johnson comparing the struggle of Ukrainians fighting Russia's invasion to people in Britain voting for Brexit at the weekend, and the strong criticism of that, Mr Javid said Mr Johnson was talking about the "general desire for people, no matter who they are, where they live, for self-determination" - and was not trying to link the situation in Ukraine to that of the UK.