Story highlights The decision means it's highly unlikely the report will be made public so long as Republicans control the Senate

Senate report was initially sent to federal agencies in the hope that it could eventually be made public

(CNN) The CIA, CIA inspector general and director of national intelligence will return their copies of the Senate Intelligence Committee's massive 6,700-page report on the CIA's interrogation and detention program under the George W. Bush administration, a Senate aide confirmed to CNN on Friday.

The decision means it's highly unlikely the report -- which concluded that interrogation techniques such as waterboarding did not elicit useful intelligence from detainees -- will be made public so long as Republicans control the Senate and the White House. Democrats are concerned it will never see the light of day if the copies are destroyed.

The report, written under then-intelligence chairwoman Sen. Dianne Feinstein when Democrats controlled the Senate, has remained classified, except for an executive summary that was released when the report was completed in 2014. The report concluded that interrogation techniques such as waterboarding did not elicit useful intelligence from detainees.

The Senate report was sent to federal agencies in the hope that it could eventually be made public, but committee chairman Richard Burr, R-North Carolina, has asked the administration to return the copies to the Senate.

The DC Circuit Court of Appeals ruled last year that the report was a congressional record, which is not subject to the Freedom of Information Act, which Burr said was why he has asked that the agencies return the documents.

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