The international rights group Human Rights Watch said proof of widespread, arbitrary detentions and torture by Assad’s regime had been found in recent visits to regions captured by the rebels.
Among the findings were the use of solitary confinement cells and a various torture devices.
Human rights watch have long accused Assad’s regime of committing grave abuses, despite constant denial by the Syrian Government.
A member of the research team that went to Syria, Ms Fakih, said,
"What we've seen in these branches pales in comparison to the types of tortures we've heard about in other branches. This is just the tip of the iceberg."