At least four people were injured when a passenger train hit the buffers at a station in Suffolk.
The accident happened at Sudbury Station on Friday evening, British Transport Police said.
A Network Rail spokeswoman said an investigation had begun into the cause of the accident.
The spokesman said the accident took place at "low speed" and Suffolk Police described casualties as "walking wounded". No-one went to hospital.
Full of passengers
The train involved was the 6.05pm Marks Tey-to-Sudbury service - the only one running on that line and there were not expected to be any more services on Friday evening.
A spokeswoman for One, the operating company, said the class 156 diesel train involved had two carriages.
She said: "It was travelling at low speed when it hit the buffers. There appears to be no damage to the train, it was a slow collision and all the passengers have gone home.
"It was a busy train, full of passengers."
One Railways provide services to London Liverpool Street and across east England.