A police officer was injured after a mass armed brawl broke out in north London in the early hours of Saturday morning.
Weapons were found at the scene in Camden Lock where a large crowd of people began fighting in the street at around 3am.
Police were called and one officer was injured as they tried to break up the brawl, on Chalk Farm Road.
But officers believe another man was also injured during the fight and fled the scene before police arrived. It is thought he has not received medical treatment.
Detectives are now appealing for information and witnesses to trace the victim and have released a CCTV image of him.
He is described as black, aged in his late teens to early 20s, around 5ft 10ins tall and with a ponytail. He was wearing a black jacket and jeans.
The Met Police said a 17-year-old boy has been charged in connection with the incident. Enquiries are continuing.
The officer who was wounded suffered minor injuries, police said on Sunday.
Anyone with information is asked to contact DC Kerry Meacher at Islington police station on 020 8345 0158 or via 101. Alternatively, they can call Crimestoppers anonymously on 0800 555 111.