Police are at the scene of a passenger train crash in Sydney's north west, NSW Police say.
Emergency services were called to the station just before 10am on Monday.
Fire and Rescue NSW said at least three people were trapped and SES crews were also on the scene.
Train operator New South Wales (NSW) Trains said they were aware of the incident and that the train had ran into a buffer at Richmond Station.
An investigation is under way after more than a dozen people were injured in a Sydney train crash.
A total of 16 people, including the driver and two other staff members, were treated at the scene.
"My first thoughts are with those who have suffered some form of injury", he said.
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He said it was "difficult" to say how fast the train was travelling when it hit a barrier. Their injuries are not considered life threatening.
Bailey Hope, who took a video of the bloodied carriages after alighting from the train, said some of those injured had stood up ready to get out at the last stop.
Those injured were soon stretchered off into waiting ambulances and rushed to hospital.
"Another witness Brett said: "[The train] came right to the end, probably at about 50 to 70 kilometres an hour, and just smashed right into the barrier.
"It's all chaos here", another caller, Steve, told the station.
"The 10:11am train service from Richmond to Central has been cancelled", Sydney Trains tweeted on Monday.
The post said the union was asking for fair working condition including a reliable roster, decent pay rises, workable timetables, and consultation on any changes made.