Demonstrators wearing shirts spelling out No

Washington ? FBI agents documented more than two dozen incidents of possible mistreatment at the Guantanamo Bay military base, including one detainee whose head was wrapped in duct tape for chanting the Quran and another who pulled out his hair after hours in a sweltering room.

Documents released Tuesday by the FBI offered new details about the harsh interrogation practices used by military officials and contractors when questioning so-called enemy combatants.

The reports describe a female guard who detainees said handled their genitals and wiped menstrual blood on their face. Another interrogator reportedly bragged to an FBI agent about dressing as a Catholic priest and “baptizing” a prisoner.

Some military officials and contractors told FBI agents that the interrogation techniques had been approved by the Defense Department, including directly by former Defense Secretary Donald H. Rumsfeld.

The documents were released in response to a public records request by the American Civil Liberties Union, which is suing Rumsfeld and others on behalf of former military detainees who say they were abused. Many of the incidents in the FBI documents already have been reported and are summarized in the ACLU’s lawsuit.

Defense Department spokesman Lt. Cmdr. Joe Carpenter said the issues raised in the report are not new. A dozen reviews of detention operations have found no policies that condone abuse, he said.

President Bush signed legislation in October that authorized aggressive interrogation tactics but did not define them. ACLU lawyer Jameel Jaffer said the documents show that stricter congressional oversight is needed.

“If you just authorize in a vague way, there’s no end to the abusive methods the interrogators will come up with,” Jaffer said.

The records were gathered as part of an internal FBI survey in 2004 and are not part of a criminal investigation.