Commander of the U.S. Central Command Gen. James N. Mattis testifies before the Senate Armed Services Committee for a review of the defense authorization request for fiscal year 2014 and the future years of the defense program on Capital Hill, Washington, D.C., Tuesday, March 5, 2013
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01:00 - Source: CNN
Washington CNN  — 

The top Republican and Democrat on the Senate armed services committee are asking Defense Secretary James Mattis to investigate accusations of torture at prisons in Yemen run by United Arab Emirates forces where US forces were also interrogating prisoners.

Sens. John McCain of Arizona and Jack Reed of Rhode Island sent a letter to Mattis on Thursday asking him to investigate the alleged abuses, which were revealed in an Associated Press report Thursday.

“We request that you direct an immediate review of the facts and circumstances related to these alleged abuses, including US support to the Emirati and Yemeni partner forces that were purportedly involved,” the senators wrote in the letter, obtained by CNN.

“We also request that you conduct a thorough assessment of what, if anything, US forces knew about these alleged abuses or subsequently learned about them,” they added.

The Associated Press reported there was a network of 18 prisons run by UAE or Yemeni forces, and that US forces participate in interrogations, although no instances were found where US forces participated in abuses.

But the senators argued that being associated with torture of detainees is bad for US national security.

“Even the suggestion that the United States tolerates torture by our foreign partners compromises our national security mission by undermining the moral principle that distinguishes us from our enemies,” the senators wrote.

McCain and Reed requested a briefing from the Pentagon on its findings as soon as possible.

Pentagon spokesman Maj. Adrian Rankine-Galloway said in a statement: “As a matter of policy we do not discuss the details of bilateral intelligence arrangements with partner nations. This is no exception.”

CNN’s Ryan Browne contributed to this report.