Police are appealing for information following an alleged attack at St Austell railway station earlier this month.
Officers at British Transport Police said the assault took place on Saturday December 7 between 2.30am and 3am.
Detective Constable David Bailey, investigating, said: “The victim of this attack, a 22-year-old man from Cornwall, was at the station when he was assaulted by a group of men following an argument.
“He was struck from behind and the attack left him with a small cut on the back of his head.
“It is believed the attack took place near the entrance to the station, and near the bus station directly opposite.
“Although it was early in the morning, we are confident those people who were at the station at the time of this frightening and violent assault will remember what happened.
Anyone with information is asked to contact British Transport Police on 0800 40 50 40 or text 61016 quoting background reference WW/B5 of 20/12/13. Alternatively, contact Crimestoppers anonymously on 0800 555 111.