A crowded Metro train derailed Friday morning just north of the Farragut North station on the Red Line, causing what emergency responders described as ‘very minor’ injuries to three passengers but serious delays to commuters who tried to return to work for the first time in days.

The six-car train carrying 345 passengers had just left the Farragut North station headed in the direction of Shady Grove at 10:13 a.m. when the front wheels of the front car came off the track in a section known as a ‘pocket track,’ which is often used in turning trains around. The first car derailed.