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.

Ukrainian drones once again disrupted civilian air travel in Russia over the weekend, leading to the dismissal of Transport Minister Roman Starovoit. On Saturday and Sunday, 485 fights have been cancelled,

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 airstrikes.