A Capitol police officer who fired a weapon inside the Cannon Office Building in Washington, D.C., Tuesday morning has been suspended pending an investigation. 

"The Capitol Police’s Office of Professional Responsibility (OPR) is investigating the discharge of a USCP weapon inside a breakroom in the Cannon Office Building," the U.S. Capitol Police said in a statement. "The officer has been suspended while OPR investigates the incident." 

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capitol hill, cannon house office building

Members of the National Guard stand outside the Cannon House Office building in Washington, D.C., U.S., on Monday, Jan. 11, 2021.  (Photographer: Sarah Silbiger/Bloomberg via Getty Images)

"At this time, we cannot say more as this is an open investigation," a department spokesperson added in an email to Fox News Digital. 

CQ Roll Call reported that the incident was an accident on the officer’s part, citing three sources familiar with the matter. 

capitol hill, cannon house office building

This file photo of the rotunda of the Cannon House office building. (Chris Maddaloni/Roll Call/Getty Images)

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The Cannon House Office Building, completed in 1908, is the oldest House office building.