Russia strikes deal with Syrian Kurds to set up base: Syrian Kurdish militia

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YPG spokesman Redur Xelil told Reuters the agreement with Russia was concluded on Sunday, and that Russian troops had already arrived at the position in the northwestern region of Afrin with troop carriers and armored vehicles.

The move will likely anger neighboring Turkey. Ankara views the YPG as an extension of the Kurdistan Workers' Party (PKK), which is waging an insurgency inside Turkey.

Kurdish fighters from the People's Protection Units (YPG) greet each other in the northeastern city of Hasaka, Syria, August 21, 2016. REUTERS/Rodi Said

"The Russian presence ... comes in agreement between (the YPG) and the Russian forces operating in Syria in the framework of cooperation against terrorism and to help train our forces on modern warfare and to build a direct point of contact with Russian forces," Xelil said in a written statement.

"It is the first (agreement) of its kind," he added.

Turkey has launched a cross-border offensive along a section of the Turkish-Syrian frontier to prevent further gains by the YPG, which controls swathes of northeastern Syria and the Afrin pocket of northwestern Syria.

The YPG is also allied to the United States in the fight against Islamic State in Syria, and is playing a major part in the U.S.-backed offensive against Islamic State's urban stronghold of Raqqa, further east.

"The agreement came into force today," Xelil said, declining to say how many Russian troops had arrived in Jandaris, the place where the base is being established.

Jandaris has previously been shelled by Turkish forces from across the nearby frontier, Xelil added.