According to a Kremlin source cited by Russian news agencies on Sunday, Syria's Bashar al-Assad and his family have reached Russia and been given asylum by the Russian government.

According to Interfax, an unnamed source stated that Syrian President Bashar al-Assad has arrived in Moscow. Russia has granted him and his family asylum on humanitarian grounds."

Meanwhile, Syrian opposition leaders have pledged to protect Russian military outposts and diplomatic offices inside Syria, according to Russian news outlets quoting a Kremlin source.

The state news agency TASS reported, "Representatives of the armed Syrian opposition are in contact with Russian officials, whose leaders have guaranteed the safety of Russian military bases and diplomatic institutions on the territory of Syria." 

Additionally, Russia has requested that the UN Security Council convene in Syria on Monday.

UN Secretary-General Antonio Guterres said on Sunday that the future of Syria is a matter for the Syrians to determine and that his special envoy, Geir Pedersen, "will be working with them towards that end.".

On Sunday, UN Secretary-General Antonio Guterres said that Syrians should decide on the direction of their future and that his special envoy, Geir Pedersen, will be assisting them towards that objective.

"There is tremendous work to be done to achieve a peaceful political transition to new institutions. "I reiterate my call for calm and avoidance of violence at this sensitive time, while protecting the rights of all Syrians," Guterres said in a statement.