The authors said they found the informant and his evidence to be credible after subjecting them to "rigorous scrutiny" and have made their findings available to the United Nations, governments and human rights groups.

Sunni Qatar was quick to back rebels who rose up in 2011 against the rule of Assad, who is backed by Shia powerhouse Iran.

(FRANCE 24 with AFP)

Personally I don't think it's a Fake ... I would say it is actually quite plausible that this gruesome large scale massacre took place ... the images and savagery displayed in this war should surprise no one today ... but that the report was commissioned by Qatar begs questioning as to the credibility and independence of the investigation ...