A man suffered facial injuries after he was attacked by a group on men on Lincoln High Street in the early hours of Sunday, June 16.
The assault took place around 4am in the area between Tesco Express and the Lola Lo night club.
The man was treated for facial injuries sustained in the attack by a group of unknown men, Lincolnshire Police said in a statement.
Police are appealing for information following the attack and would like to speak to the male photographed in relation to the incident.
Anyone who recognises the male or who has any information about the incident should contact PC 249 Mayo on 101, quoting incident number 95 of June 16, or reference number 32130023327.