Summary
Nusra Front militants clashed Friday with a leading militia from the Free Syrian Army in southern Deraa province, after attempts to separate the sides failed to prevent the fighting.
The Nusra Front, Al-Qaeda's affiliate in Syria, has accused the Yarmouk Brigade of declaring allegiance to its bitter rival ISIS, a charge vehemently denied by the FSA group.
The Nusra Front and ISIS have been cooperating in battles against regime forces and Hezbollah in the Qalamoun region, but several reports have said ISIS is now demanding that all rebel groups in the region, including Nusra, pledge allegiance to the Al-Qaeda offshoot.
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