Image source, EPA

The Austrian Chancellor, Karl Nehammer, will travel to Moscow tomorrow for talks with Vladimir Putin.

He'll be the first EU leader to meet the Russian president in person since the invasion of Ukraine.

Austrian officials say Nehammer wants to promote dialogue between Moscow and Kyiv and will also raise the issue of war crimes.

He met his Ukrainian counterpart, Volodymyr Zelensky on Saturday.

Image source, Reuters

The death toll from a missile attack on a train station in the city of Kramatorsk has risen to 57, the regional governor has said.

Pavlo Kyrylenko added that a further 109 people were wounded in the strike.

"Those with minor injuries have been released to go home, the heavily injured are being transported to safe regions and being provided with the necessary aid," he said.

The attack took place as thousands of Ukrainians - mainly women and children - were waiting for a train to take them west, to relative safety.

Russia has denied accusations that it was responsible. Instead it suggests that the missiles were Ukraine's.

Read more: Disbelief and horror after Kramatorsk train station attack

Image source, Getty Images

A staff rotation has been carried out at the Chernobyl nuclear power plant for the first time in three weeks, Rafael Mariano Gross - the Director General of the International Atomic Energy Agency (IAEA) - told Ukrainian officials today.

The former nuclear power plant - and the site of the world's worst nuclear disaster in 1986 - was taken over by Russian forces on the first day of the invasion. About 170 Ukrainian national guards were held captive in the basement and used to secure the facility, which is now back under Ukraine's control.

Workers told the BBC that they struggled to maintain the plant, sleeping in makeshift dormitories and stealing Russian fuel to keep the generator running and the station safe.

• Inside Chernobyl: We stole Russian fuel to prevent catastrophe

Gross said the IAEA would send a mission to Chernobyl soon to do a radiological assessment.

Earlier, we reported that Russian forces occupied the defunct power station and stole radioactive substances from research laboratories that could potentially kill them.

However, Ukraine's state nuclear energy company, Energoatom, said in early April the Russian forces had left the plant.

On Sunday, the IAEA said it had received more information about damage to the site's radiation monitoring labs, saying the premises were "destroyed and the analytical instruments stolen, broken or otherwise disabled".

The Russian Ministry of Defence claims it carried out attacks on 86 military units in Ukraine on Saturday night, in a statement released on Sunday.

They were in the central-eastern city of Dnipro, the southern Ukrainian city of Mykolaiv, and Ukraine's second-largest city, Kharkiv.

According to spokesman Major General Igor Konashenkov, the list of affected sites includes:

• two control points
• two ammunition warehouses
• three combustion warehouses

• 49 Ukrainian military equipment and support points

It said eight Ukrainian unmanned aircraft were shot down in the air.

The BBC has not been able to independently verify the claims.

Boxer turned Ukrainian fighter Wladimir Klitschko has thanked US rock band the Red Hot Chili Peppers for their support for Ukrainian refugees.

Referencing their song Can't Stop, which he used as his entrance music for part of his boxing career, the brother of Kyiv mayor Vitali Klitschko says: "The world 'Can't Stop' caring, all support matters."

The Californian rockers had called on world leaders and people around the world to support refugees in a tweet.

Image source, Getty Images

If you're just joining us or if you need a catch-up, here are the latest developments in Ukraine:

• Ukrainian presidential advisor Mykhaylo Podolyak has told national television that "Ukraine is ready for big battles" against Russia
• He said Ukraine must beat back Moscow's forces in the eastern Donbas region, where Moscow controls two separatist territories
• 1,222 bodies have been found in the Kyiv region since Russian forces withdrew from the area, Ukraine's prosecutor general told Sky News

• Satellite imagery firm Maxar Technologies has shared pictures of what it says is a large Russian military convoy, located east of Kharkiv
• The images, taken on 8 April, show hundreds of armoured vehicles trucks with towed artillery, and other military vehicles - stretching for at least eight miles (12km)
• Pope Francis has called for an Easter ceasefire in Ukraine to allow a push for peace during an open air mass in St Peter's Square
• Austrian Chancellor Karl Nehammer will travel to Russia tomorrow to meet President Vladimir Putin, an Austrian government spokesperson has said

We've got a little more now on Austrian Chancellor Karl Nehammer's trip to meet Vladimir Putin in Moscow on Monday.

"He is going there, having informed Berlin, Brussels and Ukrainian President Volodymyr Zelensky" to encourage dialogue, a spokesman for Nehammer said.

Image source, EPA

Austrian Chancellor Karl Nehammer will travel to Russia tomorrow to meet President Vladimir Putin, an Austrian government spokesperson has said according to the Reuters news agency.

It follows Nehammer's visit to Kyiv on Saturday to met Ukrainian President Volodymyr Zelensky.

BBC Monitoring

Russia has stepped up its "mobilisation" campaign in the eastern Donbas region and started to draft men who are not eligible for conscription, the Ukraine's military intelligence service has said on the online messaging platform, Telegram.

The agency said that employees of "strategic enterprises", who had previously been exempt from military service, were now being drafted.

It noted that the Russians plan to mobilise about 1,700 employees of the Alchevsk steelworks alone, and workers responsible for maintaining power lines were no longer off the hook for military service.

According to the Main Intelligence Directorate, several mobile brigades are operating in the self-proclaimed Luhansk People's Republic, where they stop men and issue them with a summons to come to a military enlistment office.

Earlier, the UK's Ministry of Defence said in its latest public intelligence update that Russia was trying to boost troop numbers with personnel discharged since 2012.

Image source, Reuters

More than 4.5 million Ukrainian refugees have fled their country since the Russian invasion on 24 February, according to the United Nations refugee agency (UNHCR).

The UNHCR said there were 4,503,954 Ukrainian refugees on Sunday - 62,291 more than the previous day.

It says Europe has not seen that number of refugees since World War II.

90% of those who have fled are women and children, as most men aged 18-60 are not allowed to leave Ukraine as they must stay and join the resistance.

Image source, Reuters

According to the UN's International Organization for Migration (IOM), around 210,000 non-Ukrainians have also fled the country, sometimes encountering difficulties returning to their home countries.

A further 7.1 million people have been displaced within the country, according to figures published by the IOM on 5 April, meaning more than a quarter of the population have been forced to flee their homes.

Poland hosts by far the largest number of refugees from Ukraine, with 2,593,902 people crossing into Poland since the start of the war, the UNHCR said.

Ukraine's prosecutor general says 1,222 bodies have been found in the Kyiv region since Russian forces withdrew from the area.

Iryna Veneditktova told Sky News, Ukrainian authorities are investigating 5,600 cases of alleged war crimes committed by Russian troops since the invasion began, and it had identified over 500 suspected war criminals, including top military and government officials in Russia.

"What we see in all regions of Ukraine is war crimes, crimes against humanity, and we do everything to fix it," she says.

She adds that Ukraine has evidence that Russia carried out a missile attack on a train station in the eastern city of Kramatorsk, which killed more than 50 people who were waiting for a train to take them west, to relative safety.

Russia has denied it was responsible for Friday's attack and claims that it wasn't their missile. It has also denied targeting civilians.

There's a growing number of international volunteers joining Ukrainian soldiers on the frontlines.

The UK government has warned people not to travel to the conflict; but the BBC's Emma Vardy has been speaking to those joining the conflict, including one former British Army soldier from Belfast.

She has had special access to Ukraine’s international legion of foreign fighters, which says it’s seeing large numbers of people wanting to join them, following the recent Russian attacks.

Ukrainian presidential advisor Mykhaylo Podolyak has told national television that "Ukraine is ready for big battles" against Russia.

He says Ukraine must beat back Moscow's forces in the eastern Donbas region, where Moscow controls two separatist territories, for more negotiating power before before a meeting can take place between the Ukrainian President Volodmyr Zelensky and Russian President Vladimir Putin.

"Ukraine is ready for big battles. Ukraine must win them, including in the Donbas. And once that happens, Ukraine will have a more powerful negotiating position," he said, as quoted by the Interfax news agency.

"After that the presidents will meet. It could take two weeks, three."

Image source, .

Fergal Keane
BBC News, Lviv

Image source, Getty Images

Accounts of atrocities committed by Russian troops against Ukrainian civilians are emerging daily. There are calls for President Putin and others to be prosecuted for war crimes - but how likely is that to happen?

The threat to the peace of Europe is greater now than at any time since the end of the Cold War in 1989. For nearly a month, I watched families flee westward from Lviv in trains, cars and buses as Russia waged war on their homeland.

Less than a year ago, I walked through the Hurov with Lyubov Vasilievna and Dominic, her two-year-old grandson.

I have known Lyubov for eight years, since the day she was wounded and two other grandchildren - Nikita, 10, and Karolina, six - were killed at the war's beginning in 2014 after Russian-backed forces staged a rebellion in eastern Ukraine against the Kyiv government.

Image source, MAXAR/ GETTY IMAGES

The three of them had been out walking when a shell exploded. In hospital, Lyubov told me she blamed herself for their deaths.

So, it was heartening to meet her again last year, in a time of relative peace, with a new grandchild. "I am smiling because I live for him now," she told me.

Now, as Mariupol is being destroyed, I do not know what has happened to Lyubov and Dominic. I have called and called, but her phone no longer rings.

Read Fergal Keane's full report here.

Russian missile strikes have hit the airport in the central-eastern Ukrainian city of Dnipro and a village in the region, the head of the regional military administration, Valentyn Reznichenko, said on Telegram today.

"There has been another attack on Dnipro airport. It had been completely ruined already, both the airport and infrastructure nearby. But missiles keep flying," Reznichenko said.

He added that an infrastructure facility had been hit in Zvonetske, adding that the authorities were trying to get more information about the damage and casualties.

Image source, .

Jonathan Beale
BBC defence correspondent

Image source, Reuters

A day after more than 50 people died in a missile strike on a train station in the eastern Ukrainian city of Kramatorsk people attempted to pick up the pieces.

The bodies of the dead were soon removed from the scene but you could see the dried blood and some evidence of human remains 24 hours later.

The uncollected travel bags of those who did not survive had been gathered together and lay in an empty ticket office.

Sergei, a volunteer with the Ukrainian Army, is used to death. He's been recovering the bodies of Ukrainian soldiers killed in battle.

But on Friday, he was having to gather the corpses and the remains of unarmed civilians - the innocents of this war. He has no doubt that Russia is to blame for the attack that has left more than 50 people dead and many more injured.

Watching mothers grieve over children killed in the blast had clearly taken its toll on Sergei.

"When you see our future, the future of Ukraine being killed, you can't control your emotions," he said. He calls it a genocide.

"You just don't understand the motivation of the people who did this. What was this for?"

Read more from Jonathan here.

Image source, Maxar Technologies

Satellite imagery firm Maxar Technologies has shared pictures of what it says is a large Russian military convoy, located east of Kharkiv.

The images, taken on 8 April, show hundreds of armoured vehicles trucks with towed artillery, and other military vehicles - stretching for at least eight miles (12km) and moving south through the Ukrainian town of Velykyi Burluk.

In a tweet,, external military analyst George Barrow - with the Institute for the Study of War (ISW) - said the convoy was likely heading south to the city of Izyum.

The BBC has not been able to independently verify this claim.

Russian forces seized the town of Izyum last week and have been using it as a staging ground for an apparent drive toward Slovyansk, external, a town critical to Moscow’s objective of capturing all of eastern Ukraine.

Russian forces have recently seized the strategic town of Izyum and used it as a staging post to attack Slovyansk, to the south.

The ISW says if Ukraine holds on to Slovyansk, Russia's campaign to seize the eastern regions of Donetsk and Luhansk "will likely fail".

Image source, Maxar Technologies

Image source, Reuters

In the Finnish capital Helsinki, the Ukrainian Association in Finland has laid out a memorial to children killed in Mariupol.

The display features dozens of children's shoes encircling a yellow child's overalls and a stuffed animal toy.

It's unclear how many children have been killed since the fighting began on 24 February, but earlier today Ukraine's prosecutor general announced new figures saying that at least 177 have died and 336 have been injured.

Image source, Getty Images

Image source, EPA

More now on Pope Francis' call for an Easter ceasefire to allow for a push for peace in Ukraine.

Speaking at a service for tens of thousands of people at Saint Peter's Square in the Vatican today he said the war was a "folly" that was leading to "heinous massacres" and "atrocious cruelty" against defenceless people.

Image source, EPA

Without naming Russia directly, he asked: "What victory is there in planting a flag on a pile of rubble?"

On Wednesday, the Pope condemned the targeting of civilians in Ukraine, calling the discovery of bodies in Bucha near Kyiv a "massacre" and embracing a Ukrainian flag from the "martyred town".

Russia has denied responsibility for the apparent killings of civilians in Bucha, accusing Ukraine of staging them.

Image source, Reuters

The Pope has also expressed his willingness to contribute to halting the fighting in Ukraine and said he would be ready to travel to Kyiv.

Image source, Getty Images

Ukraine says Russian forces who occupied the former Chernobyl nuclear plant stole radioactive substances from research laboratories that could potentially kill them.

Ukraine's State Agency for Managing the Exclusion Zone said on Facebook, external that Russian troops entered a storage area of the Ecocentre research base and stole 133 highly radioactive substances.

"Even a small part of this activity is deadly if handled unprofessionally," the agency said, adding "the location of the stolen substances is currently unknown."

The BBC has not been able to confirm this independently.

Earlier this week Ukraine's energy minister German Gulashchenko said Russian soldiers exposed themselves to a "shocking" amount of nuclear radiation, saying some of them may have less than a year to live.

"They dug bare soil contaminated with radiation, collected radioactive sand in bags for fortification, breathed this dust," Gulashchenko said on Facebook on Friday after visiting the exclusion zone.

The BBC's Yogita Limaye was among the first journalists to look inside the former nuclear power plant since the Russians left - you can read her report here.