A Poole teenager needed surgery after being attacked outside a Bournemouth takeaway.
An 18-year-old Poole man was assaulted by two unknown men outside Snappy Tomato Pizza on Exeter Road - leaving him with a fractured jaw after being punched in the face.
The incident took place at around 4am on Friday December 14, with Dorset Police releasing CCTV images of a man they would like to speak with.
Detective Constable Caroline Craft of Bournemouth CID said: "The victim had been on a night out when he was subjected to this unprovoked attack.
"His injuries were so severe he required surgery in hospital.
"Following further enquiries, I am now able to release two CCTV images of a man we believe could hold vital information that could help us with our investigation."
Witnesses or anyone with information should contact Dorset Police on 101, quoting incident number 14:373.