report from UN investigators into the recent violence in Syria.
Their 22-page report says that security forces, including snipers, have used deadly force against civilians in attempts to quell months of anti-government protests.
News agencies said the investigators discovered that 26 men were blindfolded and shot dead while in government custody.
In other cases, security forces allegedly killed wounded civilians by putting them alive in refrigerators in hospital morgues, Reuters news agency said.
The UN's investigators were not allowed into Syria. They interviewed victims and witnesses of the violence, some in Syria, and others in the region.