Ukrainian drones targeted a military airfield and oil depot in Russia, a defense source in Kyiv said on Saturday, after Moscow reported repelling the latest aerial barrage. Kyiv has stepped up aerial attacks on Russian territory, saying it carries out the strikes in retaliation to the bombardments Ukraine has faced since Russia invaded over two years ago. “Last night, drones from Ukraine’s Security Service visited the Morozovsk airfield in the Rostov region” that stored aircraft and guided aerial bombs, the source said. “Ukrainian drones did a great job, hitting the aviation ammunition depot,”…