A five-year inquiry into the CIA's interrogation of suspected militants following the 9/11 terrorist attacks on New York and Washington has closed without criminal charges.
The Justice Department review looked at how the agency treated 101 prisoners, some of whom were subjected to waterboarding or simulated drowning.
It also included a full criminal investigation into the deaths of two detainees, the BBC reports.
But US Attorney-General Eric Holder says there is insufficient evidence to sustain a conviction beyond a reasonable doubt.
The American Civil Liberties Union has described the decision as scandalous.