Ukraine's Security Service reported the information.According to Ukraine’s General Staff, the operation took place on the night of June 27 at the Marinovka airfield. A total of four Russian aircraft were hit, with two completely destroyed.The SBU and SSO struck the aircraft using long-range drones, causing a fire in the technical and operational section of the airfield — a critical facility where Moscow prepares, services, and repairs its aircraft.The Su-34s are multifunctional fighter-bombers frequently deployed by the Russian military on the front lines for bombing missions, including the deployment of guided aerial bombs.The full extent of the damage to Russian tactical aviation and the final results of the attack are still being assessed.