Ukraine said it struck a Russian air base on Saturday, while Russia continued to attack Ukraine with hundreds of drones overnight as part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Russia overnight hit Ukraine with the biggest missile and drone attack of the war, launching a record number of drones at Kyiv, hours after President Donald Trump spoke with Russian President Vladimir Putin to urge him to end the conflict.

Russia launched 550 drones and missiles across Ukraine overnight in the largest aerial assault since the war began. The capital Kyiv was the primary target.