Russia launched 537 drones and missiles into Ukraine overnight into Sunday morning, according to Ukraine's air force, with a Ukrainian F-16 fighter jet and its pilot also reported lost during efforts to repel the attack.

The overnight attack was one of the largest on Ukraine and included strikes in the western part of the country, which is hit less often.

The strikes targeted several regions, including western Ukraine, far from the front lines. Officials confirmed three deaths and said another two died in Russian shelling.