Russia's foreign ministry said Wednesday that its embassy compound in Damascus came under mortar fire from "terrorist groups of fighters", causing no casualties.

"Two shells fell in the grounds of the Russian diplomatic mission and two more exploded just outside the perimeter," Moscow said, causing slight damage but not injuring anyone.

The ministry said that "we decisively condemn terrorist attacks against the Russian diplomatic mission in Damascus," following a number of recent incidents.

The ministry previously in June said that mortars exploded close to the embassy's perimeter, attributing the attack either to Al-Qaeda affiliate Fateh al-Sham Front or its ally Faylaq al-Rahman.

Russia, which is providing military backing for the Assad regime, also said the embassy came under mortar fire on two separate days in February.

Moscow called for Western countries in the Security Council to condemn the latest attack and confirmed that it will continue its "uncompromising battle against terrorists in Syria."