By Randall Mikkelsen

WASHINGTON, Jan 9 (Reuters) - A U.S. judge denied a request by a group of Guantanamo inmates to investigate the CIA's destruction of interrogation videotapes and said on Wednesday a Justice Department probe of the issue would be sufficient.

Lawyers for 11 Yemeni detainees had asked U.S. District Judge Henry Kennedy to investigate whether the CIA violated a 2005 court order to preserve documents on the mistreatment of prisoners at the U.S.-run prison at Guantanamo Bay, Cuba.

They said trusting the Justice Department to investigate the issue would be a "classic case of the fox guarding the henhouse" and called for a broad inquiry into the U.S. handling of interrogation records.

The CIA disclosed last month that it had destroyed hundreds of hours of tapes showing the harsh interrogations of two terrorism suspects -- suspected al Qaeda members Abu Zubaydah and Abd al-Rahim al-Nashiri.

Among the techniques believed to be used in the 2002 interrogations were a simulated form of drowning, known as waterboarding, which has been condemned internationally as illegal torture.

However, Kennedy wrote in denying the investigation request that the two suspects were interrogated before they had been at Guantanamo, so they would not have been covered by his order to preserve evidence.

The detainees' lawyers "offer nothing to support their assertion that a judicial inquiry ... is warranted," Kennedy wrote. He also said he accepted Justice Department assurances that it would tell the court if the CIA had violated its order to preserve evidence.

U.S. Attorney General Michael Mukasey, who took office last November, launched last week a criminal investigation into the videotapes' destruction.

His choice to lead the probe, federal prosecutor John Durham of Connecticut, began work last week with briefings in Washington, officials said.

But human rights groups such as the American Civil Liberties Union and other critics have questioned the independence of the federal probe.

They have asked that probe look into the broader issue of whether the interrogators broke anti-torture laws, and have called for an independent prosecutor.

But Kennedy said a presumption that federal officials would carry out their duties "was especially warranted" with respect to Mukasey, and that he saw no reason to question whether the investigators would "follow the facts wherever they may lead."

(Reporting by Randall Mikkelsen; Editing by Eric Beech)

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