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 launched its largest aerial assault of its three-year war on Ukraine overnight, targeting the capital and other regions with missiles and drones for a second night in a row, even as the two sides prepared to conclude a major prisoner exchange.

A second consecutive day of strikes sent civilians running for shelters and killed at least 12 people, according to Ukrainian officials.