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

Ukraine and Russia exchanged a fresh wave of airstrikes Friday night, July 4, into Saturday, July 5, as Moscow hit Kyiv with its largest drone strike since the war began, and Ukraine claims to have taken out a stockpile of Russian weapons at an airbase.