The United Nations High Commissioner for Human Rights, Navi Pillay, has called for investigations into atrocities alleged to have been committed by Syrian rebels.
The call comes after footage emerged of executions of captured Syrian soldiers in Khan al-Assal in July.
Pillay said the images were shocking and those responsible for violations of international humanitarian law and international human rights law on all sides have to be held accountable.
"Opposition forces should not think they are immune from prosecution. They must adhere to their responsibilities under international law," she said.
"These images, if verified, suggest that executions were committed in Khan al-Assal. There needs to be a thorough independent investigation to establish whether war crimes have been committed. And those responsible for such crimes should be brought to justice."
