CCTV footage has been released for the first time by police in connection with an attack on a man in Epping High Street earlier this year.
The video shows a group of men, dressed in casual clothing, walking in the area at around the time of the attack in February.
The victim, a 22-year-old man from Welwyn Garden City in Hertforshire, who had been drinking, and cannot remember exactly what happened, came across a group of males.
He was struck by a single punch that fractured his cheek bone.
DC James Smith said: "The victim did not report this injury to police until three weeks after the incident but we have studied CCTV and are now able to issue these images and hope that someone will recognise this group of people."
Anyone with information is asked to contact Dc Smith at Epping CID on 101 or give information anonymously via Crimestoppers on 0800 555 111.
