Russian forces launched the largest aerial attack of the war on Ukraine, killing 12 and injuring dozens. President Zelenskyy urges the US to condemn Russia's actions.

Drones smuggled into Russia hit bases as far away as Siberia and the far east, destroying 41 aircraft that carry cruise missiles and detect enemy planes, said a Ukrainian official.

Russian and Ukrainian forces exchanged deadly cross-border drone and missile attacks during the overnight hours Sunday into Monday morning despite international diplomatic efforts to end hostilities.