UN High Commissioner for Human Rights Navi Pillay says that over the past two weeks her office has received reports of "a succession of mass executions of civilians and fighters who were no longer participating in hostilities in Aleppo, Idlib and Raqqa by hardline armed opposition groups in Syria, in particular by the" al-Qaida linked Islamic State of Iraq and the Levant.
She warned that such killings violate international humanitarian law, and the numbers of such violations are thought to be alarmingly high.
