WASHINGTON - A human rights organization says it has collected evidence of two previously unreported cases in which US agents used water-boarding or a similar harsh interrogation technique on Libyan militants held by American forces in Afghanistan.

In a report released on Thursday, 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.

Human Rights Watch 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.

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