Syria: 'Coffin' cells discovered following Bashar al Assad's downfall
Under a complex built by Syria's internal security services, the cells, where an unknown number of prisoners were held, tortured, moved on to other prisons, or just murdered where they lay, were no more than 6ft long and 4ft wide.
Please use Chrome browser for a more accessible video player
3:55
Sky's Stuart Ramsay has visited an underground prison built by Bashar al Assad's regime in the city of Homs, from where many of those detained never emerged.