Thames Valley Police is releasing a CCTV image in connection with an assault in Milton Keynes.
The incident occurred at around 5.05pm at The Centre, near to Braids Barbers on Saturday (2/4).
The victim, a boy in his teens, was sat on a sofa inside the shopping centre when he was approached by a group of older males.
After discussions have taken place, two men from the group punched the victim in the face, causing a swollen right eye and a tooth to be knocked out.
The victim was treated at Milton Keynes University Hospital and has since been discharged.
Investigating officer, PC Tom Evans, based at Milton Keynes police station, said: “We believe the men pictured in this CCTV images may have vital information about this offence.
“If you are pictured or you know who the men pictured are then please contact Thames Valley Police as soon as possible.
“You can send us any information via our website or call 101, quoting investigation reference number 43220142471.”