Ukraine's air force said Russia launched 476 drones and 48 missiles into the country overnight, with Lviv, Ternopil and Kharkiv regions the focus of the attack. The attack was the largest of November to date, according to air force data, and the largest since Russia launched 705 munitions into the country on Oct. 30.

A series of explosions were heard in the western Ukrainian cities of Lviv and Ternopil, Ukrainian media and a Reuters witness reported on Wednesday, after Ukraine's military warned of a high threat of Russian missile and drone attacks.