MOSCOW, Nov. 30 (Xinhua) -- Two civilians were killed and two others injured after Ukrainian drone attacks hit Russia's border region of Belgorod, local authorities said Sunday.

In the village of Beryozovka in the Borisovsky district, a drone struck a vehicle, killing two men at the scene, the regional operational headquarters said.

Another drone detonated in the Grayvoron district, injuring a man who was hospitalized in serious condition with multiple shrapnel wounds. A woman who suffered facial burns was also taken to hospital.

Authorities added that five municipalities came under drone attack, causing damage to private homes, vehicles and outbuildings.

The Russian Defense Ministry said earlier in the day that its air defense systems shot down 230 aircraft-type unmanned aerial vehicles over the past day.