Three cars of a Metro train separated from the rest of the train Saturday morning, officials say.
The sixth car of an eight-car train on the Silver Line detached from the fifth car about 10:45 a.m. Saturday in McLean, Metro said in a statement.
A photo from a rider shows a gap of several feet between the cars. Greater Greater Washington was first to report what happened.
The braking system engaged and brought the entire 6000-series train to a stop, according to Metro. About 70 people on board at the time were transferred to another train. No injuries were reported.
Metro is investigating the cause of the separation.
All 6000-series and 5000-series Metro cars were inspected "to prevent a recurrence," Metro said.
Metro cars separated on the Green Line, near the Navy Yard station, in January 2016. A spring in the "coupler" that holds trains together was weak, Metro determined. Rail cars separated again in December 2016, on the Red Line, near the Twinbrook station.
Stay with News4 for more details on this developing story.