Majid Khan, an inmate from Guantanamo Bay and recipient of George W. Bush's administrations' "enhanced interrogation techniques," has revealed that the U.S. Central Intelligence Agency used a wide variety of horrific forms of tortures while he was being detained.

Khan said that his interrogators poured ice water on his genitals, videotaped him naked, and repeatedly touched his "private parts." The instances were not included in the initial Senate report about Khan's incarceration, according to Reuters.

A 27-page report that includes interview notes that were compiled by Khan's lawyers over the past seven years states that a number of interrogators, some of whom smelled strongly of alcohol, also threatened to beat him with a hammer, baseball bats, sticks, and leather belts.

Khan is the only known U.S. resident that was held in a detention center after being detained in Pakistan while visiting his wife in 2006, The Independent reported. He was held at an unidentified CIA "black site" from 2003 to 2006.

He later confessed to delivering $50,000 to al-Qaeda operatives in India, which was later used in a 2003 truck bombing that killed 11 people in Jakarta, as well as plotting with 9/11 mastermind Khalid Sheikh Mohammed to poison water supplies, blow up gas stations, and serve as a sleeper agent in the U.S., Reuters reported.

Conditions improved significantly in 2006, however, after the U.S. Congress passed the Detainee Treatment Act, which includes anti-torture provisions propagated by Senator John McCain, who was tortured himself in the Vietnam War.

Naureen Shah, director of Amnesty International USA's Security and Human Rights Program, has called for further investigation in the matter, according to The Independent.

"The horrific abuses brought to light today must be answered for. It is inconceivable that these allegations of heinous and torturous acts could have been unknown to the U.S. government until recently," she said.

"If that truly is the case, it only underscores the Department of Justice's obligation to reopen and expand its investigations into CIA torture," she added.