Police in Hereford are investigating a reported assault that took place last month.
The incident happened on Commercial Road at around 6.05am, shortly after the McGregor vs Mayweather boxing match finished.
A man in his 20's is reported to have been approached by a group of men as he walked in the direction of Aylestone Hill, close to the bus shelter next to the pathway to Morrison's supermarket.
The victim is believed to have been verbally abused and then punched in the face by one of the men, knocking him to the ground and rendering him momentarily unconscious.
PC Julie Watson of West Mercia Police said: "As a result of this unprovoked attack, the victim was taken to Hereford hospital with injuries to his face necessitating several areas of stitches. He also suffered from fractured teeth.
"We are appealing for anyone who witnessed the incident or anybody with information to contact us.
"We would particularly like to speak with the men pictured in the images released, as we believe they may have been in the area at the time and could have important information about the incident."