A Senate Intelligence Committee report provides the first official confirmation that the CIA secretly operated a black site prison out of Guantánamo Bay, two U.S. officials who have read portions of the report have told Al Jazeera.

The officials — who spoke on condition of anonymity because the 6,600-page report on the CIA’s detention and interrogation program remains classified — said top-secret agency documents reveal that at least 10 high-value targets were secretly held and interrogated at Guantánamo’s Camp Echo at various times from late 2003 to 2004. They were then flown to Rabat, Morocco, before being officially sent to the U.S. military’s detention facility at Guantánamo in September 2006.