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.

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

A massive Russian drone and missile attack on Kyiv Saturday wounded at least 15 people, even as Russia and Ukraine continued the biggest prisoner swap since the start of Moscow's invasion.Ukraine's air force said Russia launched 14 ballistic missiles and 250 attack drones overnight,