The Syrian government has rejected a report which claims to show the systematic torture and killing of around 11,000 prisoners, calling it "politicised" and an attempt to undermine peace talks in Geneva.
The mother of a British doctor who died in Syria has said she is "not surprised" by the killing and torture allegedly documented in some 55,000 images smuggled out of the country.
Fatima Khan told ITV News that the priority must be to save the prisoners still being held by the Syrian government to ensure that no more people suffer her son's fate.
A report claims evidence of "industrial scale killing" and torture of prisoners of the Syria regime. This article contains graphic images.
A report by leading international lawyers accuses Syria of systematic torture. A warning that this article contains graphic images.