Guantanamo Bay prison, which is already surrounded by controversy for its alleged torture tactics, is again in trouble after a Somali prisoner accused it of “mental torture”.

The Somali prisoner has told a military judge that he and other prisoners are tortured mentally. Hassan Guleed, an alleged member of East Africa al-Qaeda, testified at the war crimes tribunal that prisoners are mentally pressured to cooperate with US authorities. The prison uses loud noises, vibration and various chemical scents to unnerve them. Guleed compared the experience with other forms of abusive treatment that he underwent while he was held by CIA in other overseas prisons.

He said, “We have mental torture in the Camp 7. In the black site there was physical.”

However, he was not allowed to give further details as prosecutors and judge cut him short. Reportedly, the confinement details are classified as secret, as per Echo.

Guleed testified on behalf of a 9/11 defendant, who stated that he could not sleep because of the noises and it was impossible for him to cooperate with his defense. Apparently, the 9/11 defendant is facing a death penalty, reported FoxNews.

The Somali prisoner communicated in broken English during the testimony and had to face aggressive cross-examination. Federal prosecutor Ed Ryan questioned him about his alleged involvement with al-Qaida. Ryan asked him whether he was an al-Qaida trainer and performed surveillance on US military base as part of a suicide bombing plot. Guleed denied any involvement with Al-Qaida.  Guleed was never been charged.

Most of the inmates in Guantanamo Bay Prison have been there over a decade without charges or trial. In a recent case, a Mauritanian detainee has pleaded for his freedom. The Mauritanian, Mohamedou Ould Slahi ‘s best-selling book has given a detailed picture of prison life at Guantanamo.  He has been held in the prison for 14 years without a charge, reported Al Jazeera.