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.

After his call with Putin, Trump said he did not think the Russian leader wanted a ceasefire or an end to the three-year-old conflict.

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