Image source, EMBASSY OF UKRAINE TO THE UK

Downing Street has now confirmed Johnson's meeting with President Volodymyr Zelensky in the Ukrainian capital Kyiv.

A Number 10 spokesman said: “The prime minister has travelled to Ukraine to meet President Zelensky in person, in a show of solidarity with the Ukrainian people.

"They will discuss the UK’s long term support to Ukraine and the PM will set out a new package of financial and military aid.”

More now on UK Prime Minister Boris Johnson's trip to Kyiv where he is meeting President Volodymyr Zelensky.

The deputy head of the Ukrainian president's office, Andriy Sybiha, said on Facebook that Johnson and Zelensky were holding "a tête-à-tête meeting".

"The UK is the leader in defence support for Ukraine. The leader in the anti-war coalition. The leader in sanctions against the Russian aggressor," he added.

UK Prime Minister Boris Johnson is holding a meeting with President Zelensky in Kyiv this afternoon.

The Ukrainian Embassy in London has tweeted a photograph of the two men holding talks.

We'll bring you more details when we get them.

Image source, Reuters/Fabian Bimmer

The perpetrators of civilian killings in the Ukrainian town of Bucha, near Kyiv, were guilty of war crimes and must be held accountable, German Chancellor Olaf Scholz has said.

Since Russian troops pulled back from Bucha last week, Ukrainian officials say hundreds of civilians have been found dead.

Scholz says: "This is something we cannot forget.

"We cannot overlook that this is a crime. These are war crimes we will not accept... those who did this must be held accountable."

Scholz has said Germany will continue to supply Ukraine with defensive weapons.

Bucha's deputy mayor says more than 360 civilians were killed, with about 260-280 buried in a mass grave by other residents.

Russia has denied carrying out the killings and called the allegations a "monstrous forgery".

Gordon Corera
Security correspondent, BBC News

Traditionally, it is the job of a spy to keep secrets - but as the invasion of Ukraine loomed, Western intelligence officials made the unusual decision to tell the world what they knew.

For nearly a dozen days in February, a small group of intelligence officers had been going to bed early.

They had seen the intelligence predicting a war and knew that if Russia was really going to invade Ukraine, it would begin in the early hours of the morning.

But when the news finally came on 24 February, it still felt unreal, one recalls: "It was hard to believe it was actually happening until I woke up early that morning and put the radio on."

For months they had been sounding the alarm.

"That day people went from 'Why are you being so hysterical?' to 'Why weren't you more hysterical?'" says the official.

There was no satisfaction in being proved right, another intelligence official adds.

But at least they felt they had tried to stop a war whose scale they had been warning of for months.

Read more here.

The governor of the eastern Ukrainian region of Luhansk, Serhiy Gaidai, has urged people to flee immediately.

Gaidai has said Russia's increasing its shelling in the area, endangering the lives of about a third of residents who still remain.

Speaking to the public television broadcaster, he said Russia was "amassing forces for an offensive and we see the number of shelling has increased".

Gaidai said some 30% of people still remain in settlements across the region and have been asked to evacuate.

It come as Russia's President Putin appears to be switching the focus of his invasion to the east.

Image source, .

Image source, Reuters/Alexander Ermochenko

If you're just joining us, here's what's been happening today.

• Further attempts are under way to allow people in besieged areas to leave safely, with ten humanitarian corridors agreed
• One is in the shattered port city of Mariupol, where tens of thousands are still trapped
• The governor of the eastern Ukrainian region of Luhansk has urged people to leave immediately
• Serhiy Gaidai said Russia was increasing its shelling in the area, endangering the lives of about a third of residents who still remained
• Friday's deadly missile strike on the Kramatorsk railway station has been described as "another war crime of Russia" by Ukrainian President Volodymyr Zelensky

• Ukraine says at least 50 people died, including children, and dozens were wounded in the attack
• Western officials say Russian general Alexander Dvornikov, who played a significant role in the Russian bombardment of Syria, has been put in charge of Moscow's operations in Ukraine

More now on the ten humanitarian corridors that Ukraine has agreed with Russia to help people fleeing the war.

They will allow residents to leave a number of cities in the regions of Donetsk, Luhansk and Zaporizhzhia today, according to Ukraine's Deputy Prime Minister Iryna Vereshchuk.

We’re told people in Mariupol, Enerhodar, Tokmak, Berdyansk and Melitopol will be able to evacuate to the city of Zaporizhzhia.

While those in Severodonetsk, Lysychansk, Popasna, Hirske and Rubizhne can evacuate to the city of Bakhmut in the Donetsk region.

Emma Vardy
Reporting from Lviv

Ukrainian officials say ten humanitarian corridors to evacuate people from regions being besieged by Russian forces have been agreed for today.

Deputy Prime Minister, Iryna Vereshchuk said the proposed corridors include one for people to escape from Mariupol.

Only some of the tens of thousands of people trapped in the shattered port city have so far been able to leave, more are still in need of rescue. It’s hoped the new humanitarian corridors will help others to escape.

Ukranian forces still control most of the city, which has been the most heavily bombarded since the Russian invasion. And shelling has now intensified even more according to the governor of the region who is warning more Russian forces have been arriving.

Ukraine’s deputy prime minister has said around ten thousand people have escaped from cities in the south and east through humanitarian corridors over the past two days.

Image source, EPA/Alexander Astafyev/Sputnik

Russian officials have accused YouTube of blocking the channel for the lower house of the Russian parliament and have warned of reprisals.

Vyacheslav Volodin, head of the Duma, accuses Washington of breaching "the rights of Russians" while foreign ministry spokeswoman Maria Zakharova says "YouTube has sealed its fate".

"The United States wants to have a monopoly on the diffusion of information," Volodin said on Telegram. "We cannot allow that".

AFP journalists have confirmed the site was inaccessible.

According to Moscow, Duma-TV has more than 145,000 subscribers. It airs clips of parliamentary debates and interviews with Russian lawmakers.

On Thursday, Russia's state communications watchdog said it would ban the US internet giant Google from advertising its services in the country, accusing Google-owned YouTube of spreading "fake news" about Russia's military campaign in Ukraine.

Russia has moved to block access to non-state media and information resources and fears are mounting that Google could be next in line for a ban.

Jonathan Beale
Reporting from Kramatorsk

Medical staff at Kramatorsk hospital worked day and night to save the lives of those injured in yesterday’s attack on the city’s train station.

We arrived as some were being moved by ambulance to larger hospitals further west. Most needed surgery to remove shrapnel from their body. A child was among those who didn’t survive.

Back at the train station, military experts have been examining the remains of a missile which had landed nearby. Much of it still in tact. It’s still not clear if it was shot down. But Ukrainian authorities believe at least two missiles were fired in the direction of the train station.

We spoke to Alexi, a volunteer with the military, who helped retrieve the bodies of those killed at the scene. He also recovers the bodies of Ukrainian soldiers killed on the frontline. But he says this was much harder - with women and children among the dead.

Russia denies responsibility, but Alexi believes the train station was deliberately targeted - at a time when thousands of people were trying to leave.

Russian forces have destroyed an ammunition depot at the Myrhorod Air Base in central Ukraine, the Interfax news agency reported, quoting Russia's defence ministry.

A Ukrainian air force MiG-29 fighter and a Mi-8 helicopter were also destroyed in the attack on the base in the Poltava region, according to ministry spokesman Igor Konashenkov.

Governor of the Poltava region, Dmytro Lunin, said on social media that two people had been wounded and "significant damage" was caused to the site.

Emma Vardy
Reporting from Lviv

Image source, Reuters

There is a real effort to evacuate people from the east and south of Ukraine while Russian forces are re-grouping and re-focusing their efforts.

We heard from the deputy prime minister of Ukraine today that there are these 10 humanitarian corridors opening up today.

One of them there'll be a lot of focus on, which it's hoped will help people escape from Mariupol.

There have been a few thousand people who've got out from there under their own steam and led by the Red Cross in the past week, but that's really just a fraction of people who've been trapped there for so many weeks.

Tens of thousands of people trapped in a humanitarian crisis on the ground.

We'll have to wait and see if these new humanitarian corridors are successful.

We've seen humanitarian corridors agreed in the past and then fall down, we've seen accusations of shelling of those humanitarian corridors.

So it's always quite touch-and-go when it comes to these evacuations but there's increased concern now, increased urgency to get people out of areas where there's still heavy Russian shelling.

That attack on the train station yesterday just underlines the urgency of that.

Chernobyl nuclear power plant can be accessed again, after returning to Ukrainian control.

The plant, in the north of the country, was seized by Russian troops on the first day of the invasion, but has been taken back by Ukraine's armed forces.

The BBC's Yogita Limaye was one of the first journalists to enter the site and spoke to some of the people who work there.

Image source, REUTERS/Ueslei Marcelino

If you're just joining us here's a round up of what's been happening today.

• Ukrainian officials say ten humanitarian corridors to evacuate people from regions being besieged by Russian forces have been agreed for today

• More people need to evacuate from the Luhansk region in eastern Ukraine amid increased shelling and the arrival of more Russian troops, its governor has said.
• A weekend curfew has been imposed in the southern port city of Odesa amid fears of Russia attacks

• 132 dead bodies have been found in Makariv, around 50km (30 miles) from Kyiv, according to the Ukrainska Pravda website
• Friday's deadly missile strike on the Kramatorsk railway station has been described as "another war crime of Russia" by Ukrainian President Volodymyr Zelensky
• Ukraine says at least 50 people died, including children, and dozens were wounded in the attack.
• Western officials say a Russian general with extensive experience in Syria has been put in charge of Moscow's operations in Ukraine.
• Russia is believed to have re-organised its military leadership in Ukraine, with General Alexander Dvornikov given overall charge.

• An engineer at Ukraine's former nuclear power plant at Chernobyl has told the BBC of his efforts to prevent a nuclear disaster while the plant was occupied by Russian forces

Image source, EPA/GEORGE VITSARAS

Authorities in the southern port city of Odesa have imposed a weekend curfew because of threats of further missile strikes, according to the regional military.

"A curfew will be introduced in Odesa and Odesa region from 21:00 (19:00 BST) on 9 April to 6:00 (4:00 BST) 11 April," Odesa's military have said on Facebook.

The decision was taken "given events in Kramatorsk" and a "threat of a missile strike on Odessa," it says.

At least 50 people died and dozens were wounded after rockets hit a train station in the eastern city of Kramatorsk on Friday, Ukraine says.

Ukraine has warned Russia's regrouping to launch a fresh offensive on the country's east and south, after retreating from its offensive on the capital Kyiv in the north.

Image source, .

More people need to evacuate from the Luhansk region in eastern Ukraine amid increased shelling and the arrival of more Russian troops, its governor said.

Serhiy Gaidai told public television some 30% of residents still remained in cities and villages across the region, the Reuters news agency reported.

It comes amid warnings that Russia plans to intensify its attacks in the eastern Donbas region, which includes Luhansk, as it seeks to create a land link with the previously annexed Crimea.

Anna Foster
Reporting from Lviv

Viktoria Kovalenko remembers the moment clearly.

"There was an explosion, or some kind of shots. It deafened me. The back windscreen shattered. My husband shouted, 'Get out of the car.'"

The horror of that day is almost unimaginable.

Nine days into the war in Ukraine, as the fighting raged, Viktoria and her husband Petro had finally decided to flee Chernihiv, in the north of the country. They wanted to keep the children safe. Twelve-year-old Veronika was Viktoria's daughter from her first marriage. Her other daughter, Varvara, is just a year old.

They took what they needed, and drove away from their family home. As they left the outskirts of the city, heading south near the village of Yahidne, stones in the road blocked their path. Petro pulled over, climbed out and started to haul them out of the way.

Seconds later, their car was fired on.

Viktoria saw her daughter Veronika and husband killed in front of her.

"I tried to stay calm, I was holding my baby daughter and I needed to get her to safety".

Read more here - but be aware the account contains graphic detail which some people may find distressing.

Some news on possible evacuations today.

Ten humanitarian corridors have been agreed for Saturday, including from the southern city of Mariupol by private transport, Ukraine's deputy prime minister Iryna Vereshchuk says.

The BBC's Tom Bateman met civilians who've managed to flee Mariupol in recent days, who described it as a "graveyard".

They spoke of bodies buried in shallow graves, looting by Chechen fighters, and starving residents being killed when they venture out of shelters to find water.

You can read their testimony here.