Russia and Ukraine swapped hundreds more prisoners on Sunday, the Russian defense ministry said. The announcement came hours after a massive Russian drone-and-missile attack targeted Ukraine.

Russia and Ukraine have completed the first phase of what is expected to be the biggest prisoner exchange since the start of the war, with almost 800 people released on Friday.

Russia and Ukraine began their largest exchange of prisoners of war on Friday, with each side returning 390 soldiers and civilians, according to both governments. More swaps were expected on Saturday and Sunday, as the two countries have committed to exchange 1,000 prisoners each.

Russia and Ukraine exchanged hundreds more prisoners Saturday as part of a major swap that amounted to a rare moment of cooperation in otherwise failed efforts to reach a ceasefire.

Russia and Ukraine conducted the largest prisoner of war exchange of the war to date on Wednesday, with around 1,000 soldiers from each side swapped.

The hourslong raids, involving hundreds of drones, were a reminder that any diplomatic resolution to the conflict remains far off.

Russian Foreign Minister Sergey Lavrov announced on May 23 that Moscow will convey its peace terms to Kyiv immediately after the completion of the ongoing prisoner exchange between the two countries.

Russia and Ukraine swapped hundreds more prisoners Sunday in the third and last part of a major exchange that was a rare moment of cooperation in otherwise failed efforts to reach a ceasefire in the more than three years of war.

Russian drones and missiles again bombarded cities across Ukraine on Saturday night into Sunday morning despite the completion of a major prisoner exchange.