Russian's military has said that it shot down an "unknown drone" that came close to Khmeimim air base in Syria.
"There are neither casualties nor physical damage. Russia's Khmeimim air base is operating as normal," said the Russian Defense Ministry on Monday.
The so-called Syrian Observatory for Human Rights said that explosions had been heard from the base's vicinity, which appeared to be from Russian air defenses.
In January, Russia said that its troops have successfully repelled multiple drone attacks launched by militants on its naval and air bases in Syria.
Russia has been conducting air raids against terrorist outfits in Syria at the Damascus government’s request since September 2015. Moscow has also maintained a naval group in the Mediterranean since the start of its anti-terror campaign in the war-ravaged Arab country.