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,

A large-scale prisoner exchange between Russia and Ukraine – the only concrete outcome of peace talks – was thrown into doubt on Saturday local time after Moscow and Kyiv accused each other of delaying and thwarting the swap.

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