Via NBC:

The entire D.C. Metrorail system will be shut down Wednesday for an emergency investigation, two sources tell News4.

Metro officials are expected to announce at 4 p.m. Tuesday that they need to inspect as many as 1,200 pieces of equipment, as News4’s Tom Sherwood was first to report.

A cable fire early Monday caused delays on the Blue, Orange and Silver lines throughout the day.

One Metro rider died and dozens were hurt Jan. 12, 2015 after a Metro train filled with smoke near the L’Enfant Plaza station. Carol Inman Glover, 61, of Alexandria, Virginia, was a beloved mother and grandmother who had just won her company’s employee of the year award.