Update at 9:50 p.m. — WMATA has issued a statement apologizing for the “significant delays.” The disabled train was rendered inoperable by a brake malfunction, which also made it impossible to tow, WMATA said.

A train that became stuck just outside the Clarendon Metro station caused major delays on the Orange and Blue lines tonight.

The Vienna-bound train stopped outside the station between 5:30 and 6:00 p.m. due to a mechanical problem. Immediately, commuters heading from D.C. to Virginia on the Orange and Blue lines started experiencing delays as Metro began single-tracking around the crippled train.

On Twitter, passengers reported overcrowded platforms, delays in excess of an hour, and a mad rush for buses, taxis and Uber cars outside stations. A compilation of some of the tweets can be found below, after the jump.

The disabled train was finally moved around 7:30 p.m. Riders were stranded on it for about 90 minutes.

“Passengers were transferred to a second train that was brought to the disabled train,” Metro spokesman Dan Stessel told ARLnow.com. “They walked from the front car of the disabled train through the last door of the rescue train. Their total delay was quite significant due to train’s location on a grade.”

“Metro Transit Police boarded the train in the tunnel to make sure everyone was okay,” Stessel added. “Car maintenance techs also boarded while it was disabled.”

No medical issues were reported among the passengers.

Photo courtesy @afranz409