MOSCOW, Oct. 17 (Xinhua) -- Russian air defense systems shot down 61 Ukrainian drones overnight, including two over the Moscow region, the Russian Defense Ministry said Friday.

"During the past night, from 11 p.m. (2000 GMT) on Oct. 16 to 7 a.m. (0400 GMT) on Oct. 17, air defense duty systems intercepted and destroyed 61 Ukrainian fixed-wing unmanned aerial vehicles," the defense ministry said in a statement.

Thirty-two drones were downed over Crimea and 13 over the Rostov Region, it added.

Russia's Federal Air Transport Agency imposed flight restrictions at multiple Russian airports overnight for safety reasons, lifting them on Friday morning. In the city of Sochi, over a dozen flights were delayed due to the restrictions, and one flight was diverted to another airport, according to the local airport.