"Confinement Conditions at a U.S. Screening Facility on Bagram Air Base" was released Thursday by Open Society Foundations. a group funded by financier George Soros. Some of the detainees interviewed for the report said they were confined at the classified detention facility this year.
Inmates said conditions at the prison included cold isolation cells and food and bedding that were scanty and inappropriate. They said they were denied visits with the International Red Cross and kept from practicing their religion and from getting exercise.
They referred to the detention center as Tor Jail or Black Jail, the report said.
"The allegations about Tor Jail should be taken seriously by the Obama Administration, which has sought to reform detention practices in Afghanistan," said Jonathan Horowitz, the author.
Notable deaths of 2014 [PHOTOS]
Hiker dead in apparent bear attack in New Jersey