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 launched a major attack on the Ukrainian capital Kyiv and killed at least 13 people in strikes across the country as the two sides released hundreds more prisoners on the second day of a major prisoner exchange.

Ukrainian President Volodymyr Zelensky called for more sanctions against Russia as Russian drones and missiles bombarded more than 30 cities across Ukraine, while over 300 war prisoners were