The report on government-sanctioned interrogation at sites around the world for questioning captured al Qaeda and other militants prompted the United States to warn its facilities abroad to shore up security in case of violent reactions.
Sources familiar with the document said it includes graphic details about techniques the Central Intelligence Agency used in the years after the Sept. 11, 2001, attacks on the United States.
The sources said tactics meant to force detainees to divulge information on terrorist plots and cells went beyond the techniques authorized by White House, CIA and lawyers working for President George W. Bush's Justice Department.
Cases in which CIA interrogators threatened one or more detainees with mock executions, a practice never authorized by Bush administration lawyers, are documented in the report, the sources said.
It concludes that harsh interrogations did not produce a single critical intelligence nugget that could not have been obtained by non-coercive means. Former CIA and government leaders, including former U.S. vice president Dick Cheney, dispute that conclusion.
The report describes how al Qaeda operative Abdel Rahman al Nashiri, suspected mastermind of the 2000 bombing of the USS Cole, was threatened with a buzzing power drill, the sources said. The drill was never actually used on him.
It documents how at least one detainee was sexually threatened with a broomstick, the sources said.
It was unclear whether the report would lead to further attempts to hold those involved accountable. The legal statute of limitations has passed for many of the actions.
White House spokesman Josh Earnest said on Monday that President Barack Obama supported making the document public "so that people around the world and people here at home understand exactly what transpired."
The executive director of the American Civil Liberties Union, Anthony Romero, said in an opinion piece in The New York Times that Obama should issue formal pardons to senior officials and others to make clear that these actions were crimes and help ensure that "the American government never tortures again."

Latest News from World News Desk