The UK, France and Germany are demanding a UN meeting - as Turkey launches military action in Syria.
Kurdish fighters in the north-east of the country are being bombed.
Turkey's President claims they're a "terrorist threat".
The Kurdish forces have been backed by the US-led coalition in the fight against Islamic State, and currently control camps housing IS fighters and their families.
Former head of the British Army Chemical Weapons Unit, Hamish De Bretton-Gordon, says this risks de-stabilising the region.