British Transport Police (BTP) detectives are appealing for help to identify a man they believe may have information about an assault that took place at Haltwhistle railway station.
The incident took place at around 6.15pm on Tuesday, 25 March on board the 17:16 Newcastle to Glasgow service while it was stationary at Haltwhistle station.
Detective Constable Kirk Freeth, the investigating officer, said: “The victim, a 20-year-old man from County Durham, was attacked on board the train by two men. The two men walked down the platform, boarded the train and then began punching the victim, grabbing him by the throat. Fortunately he only sustained minor injuries including a marked neck and a swollen eye”
A 51-year-old man was arrested following the assault. He has since been interviewed and released on police bail.
Investigators are now releasing a CCTV image of a second man who they would like to speak to in connection with the incident.
DC Freeth added: “Itâ€™s vital that we trace the man pictured. Iâ€™d urge anyone who recognises him, or has any information that could assist the investigation, to please get in touch.”
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting background PSUB/B2 of 11/04/14. Information can also be passed to the independent charity Crimestoppers on 0800 555 111.