Clashes erupted between ISIS and Nusra Front fighters near the border with Lebanon Friday, after gunmen rejected an attempt by the latter to unite the opposition in Syria’s Qalamoun region under a single leader.

The clashes were concentrated on the outskirts of the Syrian village of Ras al-Maara, a source close to the Nusra Front told The Daily Star. Ras al-Maara is a few kilometers from Lebanon’s northeastern town of Arsal, the scene of ongoing clashes between the Lebanese Army and the two jihadi groups.

Nusra, Al-Qaeda’s official affiliate in Syria, has had an on-again, off-again relationship with ISIS since the two had a falling out last year over chain of command when ISIS’s current leader Abu Bakr al-Baghdadi tried to absorb Nusra. […]