Ukraine and Russia exchanged another group of ill and severely wounded servicemen on Thursday, officials from both countries said. All of the Ukrainian troops need treatment, Ukraine's President Volodymyr Zelenskiy said in a message on the Telegram messaging app that did not go into details on the numbers involved.

Neither country disclosed how many prisoners were transferred.

A new prisoner swap between Ukraine and Russia has begun, officials in both countries said Monday, with Ukrainian soldiers who have spent nearly the entire duration of the war in captivity among those returning home.