NEW YORK - Documents abandoned in Tripoli revealed the extent of Moammar Gaddafi's intelligence services cooperation with the CIA and its British counterpart, the MI-6, that included the rendition of terror suspects to Libya for interrogation, according to US media reports. The CIA was among a number of foreign intelligence services that worked with Libya's agencies, and the discovery of the documents from the security building could spark tensions between Washington and Libya's new rulers. Although it has been known that Western intelligence services began cooperating with Libya after it abandoned its programme to build unconventional weapons in 2004, the files left behind as Tripoli fell to rebels show that the cooperation was much more extensive than generally known, The New York Times reported Saturday. Some documents indicate that the British agency was even willing to trace phone numbers for the Libyans, and another appears to be a proposed speech written by the Americans for Col. Gaddafi about renouncing unconventional weapons, the paper said. The documents were discovered Friday by journalists and Human Rights Watch, the report said. There were at least three binders of English-language documents, one marked CIA and the other two marked MI-6, among a larger stash of documents in Arabic. None of the documents were written on letterhead, it said. But the binders included some documents that made specific reference to the CIA, and their details seem consistent with what is known about the transfer of terrorism suspects abroad for interrogation and with other agency practices. And although the scope of prisoner transfers to Libya has not been made public, news media reports have sometimes mentioned it as one country that the United States used as part of its much criticized rendition programme for terrorism suspects. A CIA spokeswoman, Jennifer Youngblood, declined to comment on Friday on the documents. But she added: It cant come as a surprise that the Central Intelligence Agency works with foreign governments to help protect our country from terrorism and other deadly threats. The British Foreign Office said, It is the longstanding policy of the government not to comment on intelligence matters. While most of the renditions referred to in the documents appear to have been CIA operations, at least one was claimed to have been carried out by MI-6. The rendition programme was all about handing over these significant figures related to Al-Qaeda so they could torture them and get the information they wanted, Peter Bouckaert, emergencies director of Human Rights Watch, who studied the documents in the intelligence headquarters in downtown Tripoli, was quoted as saying.