The remarks were made during a meeting between high-ranking Russian diplomats and a US Undersecretary of State Wendy Sherman in Moscow on Friday.

Sherman did not address reporters after her meeting with Russian Deputy Foreign Ministers Mikhail Bogdanov and Gennady Gatilov, but the Russian Foreign Ministry said the two diplomats told Sherman that foreign-backed militants are a threat to both Syria's future and regional stability.

“The Russian representatives stressed the importance of uniting efforts by the Syrian government and the patriotically-inclined opposition to fight terrorist groups whose activities are threatening not only the future of Syria, but also regional stability,” the Russian Foreign Ministry said in a statement.

Sherman's visit to Moscow comes just days before a crucial meeting in Paris between US Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov on the upcoming Syria crisis conference.

According to Russian officials, Lavrov and Kerry would also hold a joint meeting in the French capital on Monday with UN-Arab League Special Envoy to Syria Lakhdar Brahimi.

The Geneva II conference, which is aimed at finding a political solution to the Syria crisis, is scheduled to be held in Switzerland in two parts. On January 22, the opening session of the event will be in the Swiss city of Montreux and then it will be moved to the UN office in Geneva on January 24.

The war in Syria started in March 2011, when pro-reform protests turned into a massive insurgency following the intervention of Western and regional states.

The unrest, which took in terrorist groups from across Europe, the Middle East and North Africa, has transpired as one of the bloodiest conflicts in recent history.

According to the United Nations, more than 120,000 people have been killed and a total of 7.8 million of others displaced due to the violence.

SHI/SHI