U.S. Capitol Police suspended an officer on Monday after a congressional aide saw a copy of an anti-Semitic document near a Capitol Hill checkpoint on Sunday, The Washington Post reported.

Photographs obtained by the Post show a printed copy of the Protocols of the Meetings of the Learned Elders of Zion on a table by the security post inside an entry point to the Longworth House Office Building.

The booklet is described by the Anti-Defamation League as a classic in paranoid, racist literature that claims to spell out the alleged secret plans of Jewish leaders seeking to attain world domination.

According to the Post, at around 7 p.m. on Sunday, a House staff member spotted and photographed the papers while leaving the Longworth building from the South Capitol Street entrance.

On Monday morning, the Post provided the photographs to the Capitol Police, and asked for comment.

On Monday evening, the Capitol Police told The Hill in a statement that the departments Acting Chief Yogananda Pittman ordered an officer to be suspended after the anti-Semitic material was discovered. The officer will remain suspended pending the outcome of an investigation by the departments Office of Professional Responsibility.

We take all allegations of inappropriate behavior seriously, Pittman said in a statement. Once this matter was brought to my attention, I immediately ordered the officer to be suspended until the Office of Professional Responsibility can thoroughly investigate. 

According to the Post, it is unclear who the document belonged to when it was found. The photographs show tattered and stained pages held together by a binder clip, and a date stamp indicating it was printed in January 2019, the Post reported. 

Zach Fisch, the chief of staff to Rep. Mondaire Jones (D-N.Y.), said he photographed the document then provided it to The Post. Fisch said was “extremely rattled” by it in the aftermath of the Jan. 6 insurrection in which rioters were seen wearing anti-Semitic attire, including one person photographed wearing a shirt that read Camp Auschwitz.

Some members of the Capitol Police department have been under scrutiny for their actions during the riot in which videos show rioters easily bypassing security, which included the breaching of the Senate chamber.