One of dozens, and perhaps many more, people who were seized and disappeared into the Central Intelligence Agency's network of secret prisons, the Palestinian native says he was never beaten by US officials, according to his testimony collected by the US-based rights group.

But he described a regime of extreme deprivation and sensory discomfort for most of his two "grave" years in prison.

Born in Jordan and raised in Saudi Arabia, Jabour, 30, moved to Pakistan in 1994.

According to his own account, recounted to HRW in December and published Tuesday, he trained at a militant camp in Afghanistan in 1998 for three months and in 2003 helped Arab militants fleeing to Pakistan.

But he insisted he never helped Al-Qaeda militants, only those unaffiliated fighters, and that he was never involved in terrorist groups or activities.

On May 9, 2004, he was arrested by Pakistani authorities in Lahore, spending four days in a police post, where he was chained to the ceiling, beaten and burned, though the physical torture halted during the third day while he was interrogated by three people he believes were US officials.

He was then driven to a private home in Islamabad, placed in prison, and interrogated for hours by Americans, interspersed with more beatings by Pakistanis when the US officials were not around.

One month later, he was transferred by airplane to another prison, run by Americans. No one told him where he was, but guessed he was probably in Afghanistan.

There, his clothes were cut off and he was placed in a windowless cell one meter wide by two meters long, the light always burning, with only a bucket and two old blankets. One hand was chained to the floor, while two cameras and a microphone on the high walls kept him under constant surveillance.

The next day, guards shaved his head, his beard and moustache, and took him still naked to an interrogation room, where his body was filmed in detail -- a procedure repeated when he was taken from the prison two years later.

From there began innumerable interrogations. The US agents, men and women, showed him hundreds of photographs and questioned him about his activities and the people he knew.