Human Rights Watch says it has collected evidence of two previously unreported cases in which U.S. agents used water boarding or a similar harsh interrogation technique on Libyan militants held by American forces in Afghanistan.
In the report Human Rights Watch also says it acquired new evidence of the extent to which the United States and some of its allies, including Great Britain, allegedly detained exiled opponents of late Libyan leader Muammar Gaddafi and forcibly transferred them back to Libya.
HRW said that it assembled its report by interviewing victims and witnesses familiar with alleged abuses and by combing through once-secret archives that became public during the Libyan revolution that led to Gaddafi's ouster and eventual death.
Documents found in the archives following the collapse of Gaddafi's regime included classified correspondence between top Libyan officials and officials from the CIA and Britain's spy agencies MI5 and MI6.
They illustrate how, between late 2003 when Gaddafi agreed to give up his weapons of mass destruction programs, and the 2011 Libyan revolution, Gaddafi and Western intelligence agencies quietly cooperated in battling Islamic militants.
U.S. and British officials defended their governments' actions.
Some of the other nations that Human Rights Watch alleged to be U.S. collaborators in these operations are the Netherlands, Pakistan, China, Malaysia, Morocco and Sudan.