Russia has halted air strikes in Syria in accordance with a ceasefire brokered by the country and the US.
Russia entered the Syrian conflict on behalf of ally President Bashar al-Assad in September 2015, and its air power has played a significant role in the recent major gains by government forces.
"Russia's air force fully halted bombing in the green zone - that is in those areas and those armed groups which had sent us ceasefire requests," Lieutenant-General Sergei Rudskoi, a senior representative of the General Staff, said.
A lull in fighting was reported throughout most of Syria on Saturday, hours after the US-Russia brokered "cessation of hostilities" agreement took effect.