A car bomb likely planted by al Qaeda splinter group the Islamic State in Iraq and the Levant (ISIL) killed two rival rebel leaders and five others in eastern Syria, a group that monitors the violence said on Tuesday.

ISIL, a hardline Islamist group which has seized swathes of territory in Syria and Iraq, has been fighting rival insurgents for months to consolidate its grip on Syria’s oil-producing Deir al-Zor province on the border with Iraq.

The infighting has killed more than 600 fighters and driven tens of thousands from their homes. […]