21:13 14 Apr
BREAKING
Moskva warship has sunk - Russian state media
Russia's defence ministry says its Moskva warship has sunk, state media is reporting.
Ukraine says it carried out a strike on the vessel, while Russia claims ammunition on board blew up.
The Moskva was reportedly being towed to Crimea for repairs.
In a statement, Russian military department said: "During the towing of the Moskva cruiser to the port of destination, due to damage to the hull received during the fire from the detonation of ammunition, the ship lost stability,"
"In the conditions of stormy seas, the ship sank."
21:27 14 Apr
Family fears for 'captured' Briton
The World Tonight
We reported earlier that a British man who was fighting with Ukrainian forces in Mariupol has appeared handcuffed on Russian media.
Aiden Aslin's mother told the BBC's Emma Vardy that she believed it was him in the images.
The BBC has now spoken to Aslin's brother, who expressed the family's fears for his safety.
Nathan Wood told Radio 4’s World Tonight programme after the fighting started his brother put up a social media post saying his position had been hit by the Russians.
Wood said: "We can tell that he's been beaten pretty badly - he's got a massive bump on his head – it looks like he's been hit on the head, in one picture he has a swollen eye."
He said his brother now has joint British and Ukrainian citizenship, adding the "British government may have given him an opportunity to leave, but Ukraine is his home and his life is there; his wife lives there".
But he said: "He's still a British citizen – so the UK government can't just turn a blind eye to this".
21:29 14 Apr
What do we know about the Moskva?
Russia's flagship Black Sea missile cruiser, the Moskva, has sunk in rough seas while being towed after suffering a fire onboard, according to Russian media.
The defence ministry said ammunition on the Moskva exploded in an unexplained fire on Wednesday.
Ukraine claims it struck the 186-metre (610 foot) vessel with its Neptune missiles.
The 510-crew warship has led Russia's naval assault on Ukraine, making it an important symbolic and military target.
Earlier in the conflict the Moskva gained notoriety after calling on Ukrainian border troops defending Snake Island in the Black Sea to surrender - to which they memorably radioed a message of refusal which loosely translates as "go to hell".
Originally built in Ukraine in the Soviet-era, the vessel entered service in the early 1980s according to Russian media.
The missile cruiser was previously deployed by Moscow in the Syria conflict where it supplied Russian forces in the country with naval protection.
The cruise missile system that Ukraine says was deployed was designed by Ukrainian military engineers in response to the growing naval threat posed by Russia in the Black Sea, following its annexation of Crimea in 2014.
As our Russia editor, Steve Rosenberg, writes: Whatever the cause of the Moskva's destruction, the damage is bad news for Moscow.
It is the flagship of Russia's Black Sea fleet, and, as such, a symbol of Russia's military power.
21:41 14 Apr
Cause of explosion onboard Russian ship still unconfirmed
There have been conflicting reports throughout the day about the cause of the explosion onboard the Russian warship Moskva, which has reportedly now sunk.
The flagship of Russia's Black Sea fleet was being towed to port when "stormy seas" caused it to sink, according to a Russian defence ministry statement.
The 510-crew vessel was an important symbolic and military target, and has led Russia's naval assault on Ukraine.
Ukraine claims it struck the warship with its missiles, but Russia has made no mention of an attack.
Earlier, Russia had said there was a fire on board after ammunition exploded.
Western officials have said that Ukraine's claims to have struck the ship with a missile are the most credible.
21:56 14 Apr
Thirty Ukrainians to return after prisoner swap
Thirty prisoners of war are being returned to Ukraine as part of an exchange of captives with Russia.
The move, which is the fourth such exchange of the conflict, follows an order from President Volodymyr Zelensky.
"Five officers and 17 servicemen were exchanged. Also eight civilians, including one woman, were released," Ukraine's Deputy Prime Minister Iryna Vereshchuk said in a statement.
22:05 14 Apr
War crime prosecutor says inquiry must be swift and effective
Anna Foster
Reporting from Kyiv
The International Criminal Court's chief prosecutor, Karim Khan QC, has told the BBC he wants the organisation's investigation into war crimes in Ukraine to be carried out quickly and fairly.
Speaking to the BBC in Kyiv, he said there was a need for "international justice to be faster, to be more effective and have an impact on people's lives".
Mr Khan said: “International law is not perfect. I'm going to make mistakes. The office will. Justice does everywhere. But we're going to try to effectively build cases so that we get to the truth”.
Khan said his team will start with investigating obvious crimes, which he called "low hanging fruit", in an effort to speed up the prosecution.
He also called on world leaders to support the ICC's work in Ukraine, saying they need to display "a willingness politically not to lose attention and move on to the next crisis.
"If we have the focus, justice can be not a mirage. It will be something that can be delivered, as difficult as it may be."
23:03 14 Apr
Ship sinking admission a 'rare moment of truth'
Former CIA Director David Petraeus has described Russia's admission that its flagship has sunk as a "rare moment of truth".
"I'm surprised that they admitted it," he told the BBC, adding that the facts would have "come out" eventually.
23:25 14 Apr
CIA director won't rule out Russia resorting to nuclear option
Anthony Zurcher
BBC North America reporter
In his first major public address since becoming CIA director last month, William Burns warned that Russian President Vladimir Putin’s “risk appetite has grown” in recent years.
In Thursday's wide-ranging speech, he also warned that a “pugnacious and revisionist Russia” could become increasingly desperate as its invasion of Ukraine drags on.
Burns said that the potential Russian use of low-yield nuclear weapons to offset setbacks in Ukraine cannot be “taken lightly”, although there is little practical evidence to reinforce such a concern.
The CIA director went on to praise the accuracy of US intelligence in Ukraine, which he said was critical in solidifying the Western alliance and rallying global support.
He added that democracies can use information-gathering “openly and creatively” to discredit the false narratives of adversaries.
0:13
Explosions reported in Kyiv
Several loud explosions have been heard in Kyiv in the past few minutes.
Ukrainian MP Lesia Vasylenko wrote on Twitter that she heard three explosions "one after the other".
"The air raid warning has been on for an hour. Most likely #putin gone livid because of the #Moskva sinking," she added, referring to the reported sinking of a Russian warship.
One eyewitness told a BBC correspondent that the explosions took place in the south-west of the Ukrainian capital.
Explosions have also been reported in the southern city of Kherson, according to Ukrainian media.
It comes after Russia threatened on Wednesday to strike Ukraine's command centres after claiming that Ukraine had attacked Russian territory.
0:24
Lives of 2.7m people with disabilities at risk - UN
The lives of 2.7 million people with disabilities are at risk in Ukraine, a UN committee has said.
It has cited reports that many are trapped or abandoned in their homes, care centres and orphanages without basic supplies or medicines.
"People with disabilities have limited or no access to emergency information, shelters and safe havens, and many have been separated from their support networks, leaving them unable to respond to the situation and navigate their surroundings," the Committee on the Rights of Persons with Disabilities concluded.
It did not say how it had obtained the reports.
But it noted that few people with disabilities were among those internally displaced or who had reached Ukraine's borders as refugees, "indicating that many of them have not been able to flee to safety".
