Russia said Sunday that trains carrying more bodies of Ukrainian soldiers were due to depart toward the Ukrainian border, escalating a spat with Kyiv over a prisoner of war swap. “I can tell you that in just an hour,

Ukraine and Russia, earlier this month, agreed to exchange 1,000 prisoners of war and civilian detainees each in a rare moment of cooperation in more than three years of war.

Russian presidential aide urges Ukraine to "strictly adhere to the schedule and all agreements reached, and to immediately begin exchange"