Al-Qaeda-linked insurgents have executed seven militants from a rival group in Syria. This unverified video shows the al-Qaeda-linked militants shooting Hassan Jazera, the commander of the insurgent group Ghurabaa al-Sham and six of his men in the head. Divisions among insurgents have been deepening in recent months. And the groups have engaged in many deadly clashes in different parts of Syria. Several insurgent commanders have been killed on both sides during the fighting. Show Less >>