A Metro train broke down in a tunnel near Rosslyn station Thursday afternoon, according to FOX 5. All 100 to 200 passengers were safely evacuated onto the Rosslyn platform.

Sherri Ly, a Metro spokesperson, said the incident happened shortly after 2 p.m. and the train was stuck for about an hour.

“It appears to be some sort of mechanical difficulty,” she said.

Metro safety has come under intense scrutiny since a Metro car filled with smoke at L’Enfant Plaza last year. One woman died and more than 30 passengers were treated at GW Hospital after the incident.

Last month, Metro officials shut down the entire system for nearly 30 hours to inspect cables after an electric cable fire. Metro lost $2 million in revenue in the closure.

Robin Eberhardt contributed reporting.