Files obtained by the website Wikileaks have revealed that the US believed many of those held at Guantanamo Bay were innocent or only low-level operatives.

The files, published in US and European newspapers, are assessments of all 780 people ever held at the facility.

They show that about 220 were classed as dangerous terrorists, but 150 were innocent Afghans and Pakistanis.

The Pentagon said the files' release could damage anti-terrorism efforts.

The latest documents have been published on Wikileaks,the Guardian, the New York Times and in other newspapers, although it was not clear whether the papers had co-operated with Wikileaks in their release. The Times said they received the files through "another source".

The Detainee Assessment Briefs (DABs) also give details of alleged plots, revealed under interrogation, against US and European targets....