A fire broke out this afternoon in the U.S. Capitol underground trolley system, used by members of Congress, aids, and guests to travel between buildings. The incident occurred in the tunnel connecting the Capitol buildings with the Rayburn House Office Building, prompting evacuations. At least two police officers were taken to the hospital for evaluation, though no passengers on the trolley were injured.

The D.C. Fire and EMS Department confirmed crews responded to a small electrical fire atop the underground trolley, which was later extinguished. Authorities stated the exact cause of the fire remains unknown, but it was reported as an electrical issue.

No serious injuries were reported, with officials emphasizing that none of the passengers on the trolley were harmed. The incident has sparked attention due to its potential impact on the Capitol’s operations and the safety of those who use the system daily.