Turkish Prime Minister Tayyip Erdogan on Tuesday warned Syrian President Bashar al-Assad his government was on a “knife-edge” and demanded an immediate apology after attacks on Turkey’s diplomatic missions in Syria. “Nobody now expects the (Syrian) people’s demands to be met. We all want the Syrian administration, which is now on a knife-edge, to turn back from the edge of the cliff,” Erdogan told a party meeting. Non-Arab Turkey, after long courting Assad, has lost patience with its neighbour’s failure to end an eight-month crackdown and implement promised democratic reforms.