Firefighters were dispatched to the station about 9:50 a.m., D.C. Fire and EMS spokesman Oscar Mendez said. First-responders found an “arcing insulator on the track,” he said. No injuries were reported.
Blue, Orange and Silver line trains were running on a single track between the Smithsonian and Federal Center SW stations after the incident, delaying service. Residual delays remain, Metro said in an update.