Fifty-one persons were killed in Russian air strikes over Aleppo and its countryside, according to the Syrian Coordination Committees Monday.

The Syrian Observatory for Human Rights, a UK-based group that monitors the war through a network of informants in the country, reported clashes between Assad forces and the opposition in Salah el Din district.

Casualties were reported on both sides.

Syria has been engulfed in a deadly civil war since 2011, with the government fighting a number of rebel groups, leaving behind more than 400,000 deaths. 

Aleppo, a northern city that was once a thriving trade hub, has become a central battleground in the five-year Syrian war and is facing a humanitarian disaster.

Source: MENA