The Human Rights Watch report documents more than 20 distinct torture methods used by the security and intelligence services.
A 31-year-old detainee who was held in Idlib governorate in June described to Human Rights Watch how the intelligence agencies tortured him in the Idlib Central Prison.
They forced me to undress. Then they started squeezing my fingers with pliers.
They put staples in my fingers, chest and ears. I was only allowed to take them out if I spoke. The staples in the ears were the most painful.
They used two wires hooked up to a car battery to give me electric shocks. They used electric stun-guns on my genitals twice. I thought I would never see my family again. They tortured me like this three times over three days.
More top news
Supermarket website glitches have caused problems for shoppers who ordered their Christmas food delivery online.
Big Brother and Celebrity Big Brother were the most complained about programmes on British television this year, according to Ofcom.
A mild start to the Christmas week across many parts of the UK, rain spreading southwards over the next few days.