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.

A Ukrainian drone strike targeted a warehouse in Russia that stored fighter jets, bombs and other military assets, Ukraine's General Staff has said. The Borisoglebsk airfield in Russia's Voronezh Oblast was struck overnight, and imagery shared on social media showed the fiery aftermath of the attacks.

(Reuters) -Russian air defences shot down four Ukrainian drones headed for Moscow on Saturday, the city's mayor said, while one of the capital's main airports temporarily halted outgoing flights. Mayor Sergei Sobyanin said emergency services were working at the sites of the downed drones, but gave no information on potential damage.