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

Ukrainian officials say that a massive Russian drone-and-missile attack targeted the country for a second consecutive night, killing at least twelve people and injuring dozens.

Russia, using missiles and drones, launched one of the biggest assaults on the Ukrainian capital, Kyiv, since the beginning of the war more than three years ago and hours after a prisoner exchange began.