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 said Saturday it struck a Russian airbase that military officials called a "home base" of some fighter jets.

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,