DEVELOPING: ACFD Responds to Smoke Reported in Metro Tunnel

(Updated at 10:40 a.m.) A large fire department response has been dispatched to the Ballston Metro station for a report of smoke in a Metro tunnel.

Metro called the fire department, reporting smoke in one of the tunnels between the Ballston and Virginia Square stations. Power has been cut to the track as firefighters investigate.

Metro says trains are single-tracking between Clarendon and Ballston stations as a result.

Firefighters in the tunnel are reporting a smoldering pile of trash along the third rail. There’s also a report of an arcing insulator.

The large emergency response comes after Monday’s fatal Metro incident outside the L’Enfant Metro station, in which smoke filled a disabled Metro train in a tunnel.

As of 10:40 a.m., fire department units were starting to clear the scene. Metro maintenance personnel are now working on the track problem. No additional smoke or fire has been reported.

Metro is advising Orange and Silver Line riders to expect delays.

Orange/Silver Lines: Expect delays of approx 30 min due to single tracking at Ballston.

— Metrorail Info (@Metrorailinfo) January 16, 2015

Update: smoke at Ballston Metro was isolated to malfunctioning insulator, metro maintenance on scene & FD units starting to go in service

— Arlington Fire (@ACFDPIO) January 16, 2015