Update at 6 p.m. — The disabled train has been cleared and medics have left the scene. Residual delays remain, according to Metro.
Earlier: A Silver Line train is disabled at the Clarendon Metro station at the height of the evening rush hour after a rider suffered a medical emergency.
Initial reports suggest that a passenger suffered a seizure on the train, leading another passenger to push an emergency stop switch. The passenger was taken off the train and is being tended to by medics, according to scanner traffic, but the train is now disabled.
Metro is warning about delays on the Blue, Orange and Silver lines as a result of the incident.
Orange/Silver Line: Expect delays to Vienna & Wiehle-Reston E due to a disabled train at Clarendon.
— Metrorail Info (@Metrorailinfo) May 10, 2018
Blue Line: Delays possible to Franconia-Springfield due to congestion from delayed Orange/Silver Line trains.
— Metrorail Info (@Metrorailinfo) May 10, 2018