Russian Foreign Minister Sergei Lavrov yesterday warned the United States over backing Syrian separatists, saying it "may end badly".

Axar.az reports citing foreign media that speaking at the Primakov Readings International Forum, Lavrov said: "We stress every time the illegality and illegitimacy of the American presence on Syrian territory, especially since this presence is accompanied by the looting of the natural resources of the Syrian Arab Republic."

"They [Americans] export the production of oil fields and agricultural lands and use their revenues to support separatists. It is known to everyone, the separatists conflict on the eastern bank of the Euphrates river and they are playing with a very dangerous problem. I mean the Kurdish problem and these games can end badly," the Russian top diplomat added.

The Primakov Readings International Forum is an annual meeting of experts in the field of international relations and the world economy.