Al Qaeda-Linked Fighters Push Back Against Syrian Rebel Offensive

Internecine fighting

Al Qaeda-linked jihadists struck back against rival rebels in eastern and northern Syria on Friday after a week of internecine fighting among opponents of President Bashar al-Assad in which 500 people have been killed, a monitoring group said.

A coordinated offensive by armed groups had seized several strongholds of the Islamic State in Iraq and the Levant in Aleppo, on the border with Turkey, and further east in Raqqa—the only city under control of Assad's foes.