Syrian rebels have been accused of possibly committing a war crime after a video allegedly showing an execution of government soldiers appeared online.
The UN and Amnesty International condemned the alleged killings which reportedly took place after the rebels seized army checkpoints on Thursday.
Footage apparently shows the rebels beating soldiers before shooting them.
Unconfirmed reports say troops have now quit all bases near the strategic northern town of Saraqeb.
The town lies near both the main Damascus-Aleppo highway and the highway linking Aleppo to the coastal city of Latakia - making it doubly strategic.