MOSCOW - "Silence regime" has been enforced in the Syrian city of Aleppo for 48 hours on the initiative of Russia, said the Russian Center for Reconciliation of Opposing Sides Thursday.

"Silence regime" started from Thursday in order to reduce armed violence and stabilize the situation in the Syrian city, the center said.

Earlier, opposition groups were fighting with government troops in Aleppo.

Syria has been mired in a civil war since March 2011, with government forces loyal to Syrian President Bashar al-Assad fighting many opposition factions and extremist groups.

A cease-fire brokered by the United States and Russia came into force in Syria in February. It was supported by the Syrian government as well as dozens of opposition groups.