Washington ? The CIA has videotapes, after all, of interrogations in a secret overseas prison of admitted 9/11 plotter Ramzi Binalshibh.

Discovered in a box under a desk at the CIA, the tapes could reveal how foreign governments aided the United States in holding and interrogating suspects. And they could complicate U.S. efforts to prosecute Binalshibh, who has been described as one of the “key plot facilitators” in the Sept. 11, 2001, attacks.

Apparently the tapes do not show harsh treatment — unlike videos the agency destroyed of the questioning of other suspected terrorists.

The two videotapes and one audiotape are believed to be the only existing recordings made within the clandestine prison system and could offer a revealing glimpse into a four-year global odyssey that ranged from Pakistan to Romania to Guantanamo Bay.

The tapes depict Binalshibh’s interrogation sessions in 2002 at a Moroccan-run facility the CIA used near Rabat, several current and former U.S. officials told The Associated Press. They spoke on the condition of anonymity because the videos remain a closely guarded secret.

When the CIA destroyed its cache of 92 videos of two other al-Qaida operatives, Abu Zubaydah and Abd al-Nashiri, being waterboarded in 2005, officials believed they had wiped away all of the agency’s interrogation footage. But in 2007, a staff member discovered a box tucked under a desk in the CIA’s Counterterrorism Center and pulled out the Binalshibh tapes.