Two young men have been assaulted in an attack on the last train between Lincoln and Grimsby.
British Transport Police say the incident took place on Saturday December 20 sometime between 6.35pm and 7.20pm.
Today they issued an appeal for witnesses.
Investigating officer PC Racheal Croft said: “A group of men, aged between 20 to 25 years old, most of whom were wearing Christmas jumpers, were travelling on the train when one of them, a man in a green Christmas jumper, who boarded the train at Lincoln, punched another man in the head which knocked him unconscious.
“Despite this, the attacker continued to punch the victim while he was lying unconscious until the victim’s friend attempted to pull him away. As he did so, the same man punched him on the side of his head, before another person in the same group hit him to the back of his head. The group then dispersed with the attacker swapping jumpers with another man who had been wearing a red Christmas jumper. Later in the journey the offender then changed this jumper to a white top.”
PC Croft added: “This was a particularly nasty and unprovoked assault in the run up to Christmas, which could have proved far worse had the victim’s friend not intervened, who was then himself assaulted. It happened on a packed train so we are confident there will be passengers who witnessed what happened and we urge them to come forward to assist with our enquiries and help find those responsible.
“Everyone has the right to travel without fear and violence like this will simply not be tolerated. We will make every effort to track down the men responsible.”
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference PSUB/B4 of 06/01/2015.
Information can also be passed anonymously to the independent charity, Crimestoppers, on 0800 555 111.