More than 1,000 Ukraine marines have surrendered in Mariupol, says Russia

More than 1,000 Ukrainian marines defending the besieged city of Mariupol have surrendered and the port has been captured, Moscow has said, as the presidents of four countries bordering Russia arrived in Kyiv in a show of support for Ukraine.

The Chechen leader, Ramzan Kadyrov, who says his forces are playing a major role in the battle, urged the last Ukrainians holed up in Azovstal to surrender. The 26th Marine Brigade had said on Monday that it was preparing for a final battle in Mariupol.

Its capture would be the first fall of a major Ukrainian city and would help Russia secure a land passage between the self-proclaimed republics in Donetsk and Luhansk in Donbas and Crimea, which Moscow occupied and annexed in 2014.

Zelenskiy told Estonian MPs on Wednesday, without providing evidence, that Russia was using phosphorus bombs in Ukraine. Ukrainian forces in Mariupol said a drone had dropped a poisonous substance on the city, but there has been no independent confirmation that Russia used banned chemical weapons.

The Russian retreat from around Kyiv has led to the discovery of large numbers of apparently massacred civilians, drawing international condemnation and calls for a war crimes investigation. The Kyiv district police chief said on Wednesday that 720 bodies had been found around the capital, and more than 200 people were missing.