British Transport Police released images of a man who is believed to have been involved in an assault just outside the central train station in Lincoln.
The incident involved two men and took place on Wednesday, April 11, at around 7.10pm near the taxi rank at the station.
DC Bill Henry, investigating the incident, said: “Following an altercation onboard the 16.19 Scunthorpe to Lincoln service the two men involved left the train at Lincoln station.
“One of the men is then thought to have hit the other on the head from behind as he walked passed the taxi rank.
“As a result the man fell to the floor, hitting his head on the side of a taxi as he dropped to the ground. He was then stamped on and was required to attend hospital to be treated for cuts and bruising.”
DC Henry added: “The man we would like to trace has been described as in his mid to late 30’s, of average build, with a scruffy beard, moustache and strawberry blonde hair, balding on top.
“He was wearing a long bright green hoodie and dark jeans. I’d appeal for anyone who may recognise the man in the picture to come forward and help us with our investigation.”
Anyone with information should contact British Transport Police on 0800 405 040 quoting background reference NEA 6 of 16/04/201, or call independent charity Crimestoppers anonymously on 0800 555 111.