Commuters on the Sydney Metro have captured footage of a train door sitting wide open as the carriage barrelled towards its next stop.

It’s understood the driverless metro was running betweeen Chatswood Station and Crows Nest just after 8am today when the train door on a crammed carriage remained open.

Two people dressed in black stood in front of the open door and blocked commuters going near it.

Sydney Metro train running with door open
The door remained open and a warning sign said it was “out of service”. (Supplied/2GB)

A sign above the door reads “this door is out of service”.

Passengers shared vision of their unusual morning commute with Ben Fordham Live on 2GB.

In a statement, Metro Trains Sydney chief executive Daniel Williams said the incident was due to a fault and it is now under investigation.

“At approximately 8.01am a door fault was identified on a train travelling between Chatswood and Crows Nest Station,” Williams said.

“There was Customer Journey Coordinator (CJC) and Customer Operations Lead (COL) on board the service. They were contacted by our Operational Control Centre. They tried to remotely fix the issue.”

Williams said the two staff members were instructed to block the door until the metro stopped.

“When this was unsuccessful, the OCC instructed the frontline staff to manually close the door,” he added.

“To enable the train to complete its short journey to the next station, two staff members stood by the door until the service came to a stop.

Door open on Sydney metro
Train staffers dressed in black blocked the open door from commuters. (Supplied/2GB)

“The door was able to be closed at the next station, and the metro removed from service.

“We apologise to customers for the concern this caused.”

Sydney Metro opened in 2019 and now runs between Tallawong and Sydenham, with 21 stations in between.

Metro speeds reach up to 100 km/h in the tunnel section and up to 110 km/h on the surface track section, according to Sydney Metro.

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