The number of detainees subjected to these methods has never been authoritatively established, nor how many died as a result of the interrogation regime, though this number could be as high as 100. The CIA admits to waterboarding three people implicated in the September 11 attacks: Abu Zubaydah, Khalid Sheikh Mohammed, and Mohammed al-Qahtani. A Senate Intelligence Committee found photos of a waterboard surrounded by buckets of water at the Salt Pit prison, where the CIA had claimed that waterboarding was never used. Former guards and inmates at Guantánamo have said that deaths which the US military called suicides at the time, were in fact homicides under torture. No murder charges have been brought for these or for acknowledged torture-related homicides at Abu Ghraib and at Bagram.