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

Ukraine says recent Russian attacks highlight its need for further support from Washington for air defenses including more Patriot-missile batteries from the U.S.