Turkey and the Kurds - a complicated relationship

Turkey is one of the most powerful countries in the region, and its parliament has voted to join the US led coalition against Islamic State (IS) militants in Iraq and Syria - but so far it has not got involved militarily.

Kobane is right on its border, so why the reluctance to help the Syrian-Kurdish fighters defend the town from IS?

The Turkish authorities have a complicated relationship with the region's Kurdish population. BBC News explains why.