Authorities confirmed two police officers were taken to the hospital after a fire was reported Thursday afternoon in the trolley system connecting the Rayburn House and U.S. Capitol buildings.
The D.C. Fire and EMS Department confirmed crews responded to a small electrical fire atop the underground trolley, which was later extinguished.
Fire officials confirmed two U.S. Capitol Police officers were taken to the hospital for evaluation.
None of the passengers on the trolley were injured, officials said.
It is unclear who was in the vehicle at the time of the incident.
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As of 6:25 p.m. local time, all smoke was cleared and authorities were clearing the scene.
The Metropolitan Police Department said Independence Avenue was closed in both directions between Washington Avenue, SW and Second Street, SE, but later reopened.
The cause of the fire has not yet been released.
The U.S. Capitol subway system is used to move lawmakers, aides and high-profile guests safely between government buildings.
Its three lines are operated and maintained by the Architect of the Capitol (AOC).
This is a developing story. Please check back for updates
