Washington ? The CIA’s internal investigator found that agency interrogators conducted mock executions of terror suspects and in one case threatened a detainee suspected in the USS Cole bombing with a gun and power drill, congressional officials said late Friday.

The disclosures are contained in a 2004 report by the CIA’s inspector general, which has been kept secret and is to be released next week, two officials told The Associated Press. They spoke on condition of anonymity because the report has not yet been cleared for release.

The report’s findings were first reported by Newsweek on its Web site Friday night.

In one case, interrogators brought a gun and power drill into a session with suspected Cole bomber Abd al Rahim al-Nashiri, the report says.

In another episode, a gunshot was fired in a room next to a detainee to make the prisoner believe another suspect had been killed, according to the report, which a federal judge has ordered to be made public Monday in response to a Freedom of Information Act lawsuit filed by the American Civil Liberties Union.