CIA chief admits use of brutal interrogation techniques on detainees

Some officers of the Central Intelligence Agency (CIA) used brutal techniques on terrorist suspects and there was no proof of useful information yielded from the interrogation, chief of the U.S. spy agency said on Thursday.

John Brennan, in a rare televised press conference held at the CIA headquarters in Langley, Virginia, acknowledged "unauthorized" and "abhorrent" practices by some officers, saying it was "unknowable" whether the so-called enhanced interrogation techniques produced key intelligence.