LONDON- America's closest allies - Britain has strongly condemned the Central Intelligence Agency's (CIA) use of brutality and deception to interrogate "terror suspects" post-9/11 attacks as made public by a Senate Intelligence Committee report.

US president Barack Obama's close friend - British Prime Minister David Cameron reacted strongly against the report in which committee chair Dianne Feinstein said the techniques used by the CIA were "far more brutal than people were led to believe".

Cameron said, "Let's be clear, torture is wrong. Torture is always wrong. Those of us who want to see a safer, more secure world, who want to see this extremism defeated, we won't succeed if we lose our moral authority, if we lose the things that make our systems work and our countries successful. So we should be very clear about that."

Cameron added, "Now, obviously after 9/11 there were things that happened that were wrong, and we should be clear about the fact that they were wrong. In Britain we have had the Gibson Inquiry, and that inquiry has now produced a series of questions that the Intelligence and Security Committee will look at. But I'm satisfied that our system is dealing with all of these issues, and I as Prime Minister have issued guidance to all of our agents and others working around the world about how they have to handle these issues in future. So I'm confident this issue has been dealt with from the British perspective, and I think I can reassure the public about that. But overall, we should be clear: torture is wrong."

Britain also expressed concern over the harsh CIA interrogation tactics which included threats and torture as detainees were forced to stay awake for over a week at a time, while several detainees suffered from "hallucinations, paranoia, insomnia and attempts at self-harm and self-mutilation".