Fire Department Reports Smoke In Bethesda Metro Tunnel

BETHESDA, Md. (AP) -- Fire officials are reporting smoke in a subway tunnel in Bethesda.

A Montgomery County fire department spokesman tweeted Tuesday morning that there was smoke in a tunnel between

Metro's Bethesda and Medical Center stations and firefighters were on the scene.

Metro spokesman Dan Stessel says the transit agency is investigating reports of a malfunctioning electrical insulator. Stessel says he's not aware of "active smoke at this time."

In January, one woman died and dozens of people were sickened by smoke after a train became stranded in a smoky tunnel in downtown Washington. The National Transportation Safety Board is investigating the cause of the electrical malfunction that led to the smoke.

(Copyright 2015 by The Associated Press. All Rights Reserved.)