"According to the figures provided by the delegation, to date, out of the 148 men still held at the facility, only 33 have been designated for potential prosecution, either in federal court or by military commissions – a system that fails to meet international fair trial standards," the UN Committee against Torture said in the report.
The Committee expressed concern over 36 other detainees who had been designated for "continued law of war detention", as well as over the secrecy surrounding conditions of confinement at Guantanamo.
The Committee was troubled by the repeated suicides, as well as mass hunger strikes, and considers force-feeding inmates in this case as ill-treatment violating the Convention against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment.
The Committee called on the US government to cease the use of indefinite detention without charge or trial for persons suspected of terrorist attacks and release those detainees who would not be charged or tried.
The Guantanamo Bay detention camp, a highly controversial US military prison located in Cuba, has been the subject of harsh criticism since its establishment in 2002 after numerous reports filed by health workers, inspectors and former detainees described cruel and inhumane conditions at the camp, including the use of torture.
US President Barack Obama signed an order for the closure of Guantanamo in 2009, after initially promising to shut the camp down during his election campaign, describing it a "sad chapter in American history". The closure has not taken place so far.
The majority of Congress, both Republican and Democrat, oppose the closure of Guantanamo Bay prison and moving prisoners to other facilities in the United States.