Graphic details about sexual threats and other harsh interrogation techniques the CIA meted out to captured militants will be detailed by a Senate Intelligence Committee report on the spy agency's anti-terrorism tactics, sources familiar with the document said.

The report, which the committee's majority Democrats are expected to release on Tuesday, describes how senior al-Qaida operative Abdel Rahman al-Nashiri, suspected mastermind of the 2000 bombing of the USS Cole, was threatened by his interrogators with a buzzing power drill, the sources said. The drill was never actually used on al-Nashiri.

In another instance, the report documents how at least one detainee was sexually threatened with a broomstick, the sources said.