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.

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

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.