The massive missile and drone attack, one of the largest aerial bombardments of the war, casts more doubt on the U.S.-brokered peace process.

Reuters witnesses saw and heard successive waves of drones flying over Kyiv, and a series of explosions jolted the city.

Russian forces launched 367 drones and missiles at Ukrainian cities overnight, including the capital Kyiv, in the largest aerial attack of the war.

NATO scrambled fighter jets after Russia launched a massive air attack on Ukraine for a second consecutive night – killing at least seven people. Dozens of people were injured, including

Ukraine's capital Kyiv was coming under a combined drone and missile attack early on Saturday, Mayor Vitaly Klitschko said. Timur Tkachenko, head of the capital's military administration, said two fires had broken out in the city's Sviatoshinskyi district.

Russian drones and missiles again bombarded cities across Ukraine on Saturday night into Sunday morning despite the completion of a major prisoner exchange.