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.

Ukraine’s military said its special forces struck the Borysoglebsk airfield in Russia’s Voronezh region as Kyiv continues to look for ways to reduce the Kremlin’s ability to conduct