A series of graphic photographs allegedly show the slaughter of pro-government Syrians held by militants at different public execution sites outside Aleppo.
Little is known about the victims, only that they were accused of being pro-government.
Their authenticity is often impossible to verify, but these pictures, first published in the French magazine Paris Match, were taken by an independent photojournalist whose name, for his own safety, has not been publicly revealed.
Grim footage depicting a litany of crimes – murders, torture and mass killings – now emerge on YouTube and other social networks on an almost daily basis from the Syrian civil war.
Syria has been gripped by deadly unrest since 2011.