Washington ? A long-awaited final report on the Sept. 11, 2001, attacks will be released in the next two weeks, containing new information about U.S. government mistakes and Saudi financing of terrorists.

One former House Intelligence Committee member who has read the report, Rep. Tim Roemer, D-Ind., described the findings as “highly explosive.”

He said it was “compelling and galvanizing and will refocus the public’s attention on Sept. 11.” Roemer predicted that “certain mistakes, errors and gaps in the system will be made clear.”

Eleanor Hill, the staff director for the investigative panel created by the joint House and Senate intelligence committee, said Wednesday that several lengthy battles with the Bush administration over how much secret data to declassify have been resolved.

She expects the declassified version of the 800-page report to go to the Government Printing Office late this week and then be made public about a week later.

Roemer would not discuss details of the report. He said he expected the public version to be a compromise between intelligence officials who wanted to hold back data and congressional leaders and staffers who pressed for more disclosure. The classified version was completed in December.

A source familiar with the investigation, speaking on condition of anonymity, said two “sensitive areas” of the public report were especially likely to make headlines.

One section provides new information on ties between the Saudi royal family, government officials and terrorists. The FBI may have mishandled an investigation into how two of the Sept. 11 hijackers received aid from Saudi groups and individuals.

John Lehman, a member of the separate and independent National Commission on Terrorist Attacks, said at a hearing Wednesday: “There’s little doubt that much of the funding of terrorist groups — whether intentional or unintentional — is coming from Saudi sources.”

The other section is a narrative of intelligence warnings, some of them ignored or not shared with other agencies, before the Sept. 11 attacks on the World Trade Center and the Pentagon.

The report will show that top Bush administration officials were warned in the summer of 2001 that the al-Qaida terrorist network had plans to hijack aircraft and launch a “spectacular attack.”

Hill would not discuss details of the report but said it would contain “new information” developed since the joint House-Senate investigation conducted nine public hearings and 13 closed sessions last year.

Since the classified report’s completion, a working group of Bush administration intelligence officials has “scrubbed” the report, objecting to additional public disclosures.

The two chairmen from Florida who oversaw the investigation, Sen. Bob Graham and Rep. Porter Goss, have pushed for months for more disclosure.

Graham, a Democrat running for president, has said the administration was using the excuse of national security to block “embarrassments” to the government. Goss blamed the declassification battle on traditional resistance from intelligence officials.

The report will contain chunks of missing type or “redactions” to show where information was withheld, Hill said.

Roemer called the report a “well-written narrative that will be summer reading for adults the way Harry Potter is for kids.”