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

The long-classified pages detailing 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.

Former Senator Bob Graham, who chaired the committee that carried out the investigation and has been pushing the White House to release the pages, said Thursday he was "very pleased" by the news.

"It is going to increase the questioning of the Saudis' role supporting the hijackers," Graham told CNN.

"I think of this almost as the 28 pages are sort of the cork in the wine bottle. And once it's out, hopefully the rest of the wine itself will start to pour out."