Female interrogators are said to have used sexually-suggestive tactics while questioning Muslim men at the U.S. military prison in Guantanamo Bay, Cuba.

Thursday's Washington Post reports on the allegations, which the newspaper says are contained in a U.S. military investigation not yet released to the public and newly-declassified accounts from terror suspects held at the prison.

According to the Post, detainees say female interrogators have regularly violated Muslim taboos about sex and contact with women.

The prisoners complain of women touching them in provocative ways, and smearing them with what they were told was menstrual blood, but the investigation found to be red dye.

The newspaper cites an unidentifed senior U.S. defense official as saying the probe generally confirmed the allegations.

Defense Department officials say they have reprimanded two female interrogators for the tactics.