British Transport Police officers are appealing for witnesses after a report that three men assaulted a man and forced him from a train at Waterbeach railway station.

The incident is alleged to have taken place at around 8.20pm on Wednesday, October 1.

Pc Antony Orton said: “A 28-year-old man from Stratford, London, was travelling on the 7.37pm King’s Lynn to King’s Cross service. When the service arrived at Waterbech station, he was assaulted by one of three men, who forced him out of his seat and onto the platform.

The suspect reportedly then returned to the train, leaving the man on the platform.

“The man’s blue canvas rucksack, which contained a laptop, remained on board and has not been found since.”

The suspect was reported to be a white man, aged between 35 and 45, with a broad build and a long face. He is thought to have grey stubble and was seen to be wearing a cream baseball cap, a cream jacket, a white t-shirt and dark cream-coloured cargo trousers with white trainers.

His two companions were not believed to be involved in the assault but were white men, with smart and casual dress aged between 25 and 35.

Pc Orton added: “As the investigation continues, we are looking at CCTV from the surrounding area. We’re urging anyone with information to come forward as it may hold key information about what took place.”

Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference ESUB/B14 of 24/10/2014. Information can also be passed anonymously to independent charity Crimestoppers on 0800 555 111.