Russian forces shot down four Ukrainian drones near the town of Novoshakhtinsk in Russia's Rostov region which is home to an oil refinery previously targeted by Kyiv, the regional governor said on Friday.
Vasily Golubev, the governor, said that Friday's attack had not caused any damage or casualties.
The Novoshakhtinsk oil refinery was also the target of Ukrainian drones in March. That attack led to a short-term shutdown of the plant.
