D.C. Fire and Rescue responded to the report. The fire was caused by a bolt arcing on the tracks.
At about 6:15pm, a train operator saw fire on the tracks. He was able to extinguish the flames. Shortly thereafter, another operator saw fire on the tracks and firefighters were called to the scene. Metro officials said it appears a bolt caught fire.
Riders experienced delays in both directions. Riders also used the L1, L2 and L4 Metrobuses.
The investigation continues.