BAGHDAD, May 1 -- A top Pentagon intelligence officer is leading an investigation into interrogation practices at an Army-run prison where Iraqi detainees were allegedly beaten and sexually abused, officials announced Saturday. The move came amid allegations that military guards abused prisoners at the behest of military intelligence operatives.

A soldier accused of abusing prisoners at the Abu Ghraib facility wrote to his family last December that military intelligence officers encouraged the mistreatment, according to correspondence provided by the soldier's family.

"We have had a very high rate with our style of getting them to break," the soldier, Staff Sgt. Ivan L. "Chip" Frederick II, wrote in a Dec. 18 e-mail released by Frederick's uncle. "They usually end up breaking within hours."

Frederick also wrote that he questioned some of the abuses. "I questioned this and the answer I got was: This is how military intelligence wants it done," he wrote.

The Army Reserve commander who oversaw the prison said that military intelligence, rather than the military police, dictated the treatment of prisoners at Abu Ghraib. "The prison, and that particular cellblock where the events took place, were under the control of the MI command," Brig. Gen. Janis L. Karpinski said in a telephone interview Saturday night from her home in Hilton Head, S.C.

Karpinski, who commanded the 800th Military Police Brigade, also described a high-pressure atmosphere that prized successful interrogations. A month before the alleged abuses occurred, she said, a team of military intelligence officers from the detention facility at Guantanamo Bay, Cuba, came to Abu Ghraib last year. "Their main and specific mission was to get the interrogators -- give them new techniques to get more information from detainees," she said. (Washington Post, via TMW)