This story was updated at 1:50 p.m.

A Red Line train partially derailed just outside the Silver Spring station around 11:20 a.m. Tuesday after the operator ran a red signal.

The train was leaving Silver Spring, heading northbound toward Glenmont at low speeds, when the derailment occurred. All cars remained upright and none of the 32 passengers were injured, Metro says.

The operator and one passenger were stuck in the first car for about 45 minutes but they were also uninjured, according to Montgomery County Fire and Rescue Services spokesperson Pete Piringer.

Photos from news station WJLA’s helicopter show the second car in the train left the tracks at a crossover/switch area.

https://twitter.com/ProducerSass/status/1280530836413198337

The Washington Metrorail Safety Commission, the independent body overseeing Metro safety, says its preliminary investigation found the operator ran a red signal, which has been a fireable offense in previous instances.

The Safety Commission is still investigating, but spokesperson Max Smith says it appears the first car of the train went down one track while the second car went down the other.

In a statement. Metro officials said, “While the investigation is ongoing and all factors will be reviewed, current information does not indicate any conditions or failures related to infrastructure or equipment,”

Metro says six of the train’s eight cars had not cleared the platform when the train stopped following the derailment, and passengers were able to exit the train using the standard doors.

The train operator was removed from service and transported for required drug and alcohol testing per federal regulations, Metro says.

About 50 to 60 fire and rescue personnel reported to the scene, Piringer said.

This is the first train derailment with passengers on board since a derailment outside Farragut North in Jan. 2018, according to Metro records.

Metro has had five derailments in the past fiscal year (July 2019 through March 2020), but all of those involved maintenance machines, not in-service passenger vehicles.

Metro’s board is set to meet Thursday to discuss a collision between no-passenger trains at Farragut West in October. The Safety Commission meets again on August 4.

The incident could have been worse than it was.

About 11:17 a.m., a separate train without passengers entered a “pocket track” which allows trains to reverse direction. Just four minutes later, the train that derailed entered that same pocket track area and the second car derailed, according to WMATA data and radio traffic.

Photos from the Metrorail Safety Commission show just how close the two trains were from colliding, which could’ve injured many on board. Neither WMATA or the Safety Commission knew exactly how far apart the trains were, but that info will be shared in the investigation.

WMSC experts are on scene at Silver Spring (with social distancing protocols) where at least one car of a #WMATA Red Line train toward Glenmont derailed around 11:20 a.m. pic.twitter.com/1VMelFE122

— Washington Metrorail Safety Commission (@MetrorailSafety) July 7, 2020

Earlier Tuesday, flooding closed Red Line stations at Cleveland Park and Woodley Park.

The Red Line is operating between Shady Grove and Van Ness, Dupont Circle to Takoma and Forest Glen to Glenmont. Shuttle buses replace trains otherwise.

Metro says it expects to operate single-track train service through the area this afternoon.