Ukraine said Saturday it struck an airbase in Russia, which continued overnight to use hundreds of drones in its stepped-up bombing campaign. The fresh wave of attacks signal a breakthrough isn't expected anytime soon in efforts to end the more than three-year-old war.

A record 539 drone and 11 missile strikes hit Kyiv hours after a phone call between the U.S. and Russian presidents.

Russia launched 550 drones and missiles across Ukraine overnight in the largest aerial assault since the war began.