Mr Hague said the UK would work with EU partners to impose sanctions on those responsible to help bring an end to the violence.
The report, Torture Archipelago: Arbitrary Arrests, Torture and Enforced Disappearances in Syria's Underground Prisons since March 2011, includes maps locating detention centres, video accounts from former detainees and sketches of torture techniques.
Almost all the former detainees interviewed by Human Rights Watch said they had been subjected to torture or witnessed the torture of others during their detention.
More top news
Staying unsettled over the next few days, with showers or longer spells of rain
The task was deceptively simple: move 500 elephants 200 miles to a better life. But its execution proved both gripping and inspiring.
The top 10 most overcrowded trains in England and Wales have been revealed - as figures show some are carrying over double their capacity.