The long-classified pages detailing alleged ties of the Saudi Arabian government to the 9/11 hijackers will be released by Congress as early as Friday, sources told CNN Thursday.

Known as the "28 pages," the secret document was part of a 2002 congressional investigation of the Sept. 11 attacks and has been classified since the report's completion. It turns out there are actually 29 pages, sources said.

Sources said there are still some procedural steps that need to be taken before the release, which members of both parties in Congress and family members of victims have been seeking for years.