Turkey's military has provoked Russian president Vladimir Putin by bombing targets in Syria - just hours after the Kremlin warned that such action could lead to a "new cold war".
The country's army targeted Kurdish militia near the town of Azaz in northern Syria.
A Turkish government source confirmed the attack, despite the Kermlin's warning earlier today that Turkey and Saudi Arabia's proposed anti-ISIS action in the country could lead to a major world conflict.
The source said: "The Turkish Armed Forces fired shells at PYD positions in the Azaz area" referring to the Kurdish Democratic Union Party (PYD), which Turkey regards as a terrorist organisation.
Earlier today the Russian Prime Minister Dmitry Medvedev said he was fed up of Russia being accused of war crimes in Syria.