Fears battle for Mosul could open new front in wider Sunni-Shia conflict

The risk that military operations to expel Islamic State terrorists from Mosul in northern Iraq could morph into a new frontline in the wider conflict between the Sunni and Shia branches of Islam has intensified with Turkey’s disputed entry into the fray.

Binali Yıldırım, Turkey’s prime minister, confirmed reports that Turkish troops based in the contested Bashiqa area outside Mosul were firing on Isis positions with artillery, tanks and howitzers. Yıldırım said the bombardment followed a request from Kurdish peshmerga forces.