WASHINGTON The FBI has grave concerns about a secretive Republican-authored memo that members of Congress have been using to undermine special counsel Robert Muellers investigation into the Trump campaign and Russian interference with the 2016 election.

In an extraordinary public statement on Wednesday, the bureau said the classified four-page memo authored by Republican members of the House Intelligence Committee had material omissions of fact that fundamentally impact the memos accuracy.

In a party-line vote, the House Intelligence Committee used a rarely invoked procedure to approve the release of the memo, which is based on classified documents the Justice Department provided to the committee. The memo reportedly alleges that the Justice Department and the FBI abused the Foreign Intelligence Surveillance Act to spy on Carter Page, who was associated with the Trump campaign, ahead of the 2016 election.

Actual FISA experts have treated that claim with extreme skepticism.