Detectives are appealing for information and witnesses following a fight in the Camden Lock area.

Officers are also keen to trace a man – who they believe may have been injured – and have released a CCTV still in the hope that he will come forward.

Police were called shortly after 03:00hrs on Saturday, 15 April to Chalk Farm Road, NW1 following reports of a fight.

Officers attended and dispersed a large crowd; a number of weapons were found at the scene. One officer received minor injuries.

Officers were subsequently informed that a victim had left the scene prior to officers attending and without receiving medical treatment. Detectives would like to speak with this man as part of their ongoing investigation.

He is described as black, aged in his late teens to early 20s, approximately 5ft 10ins tall with a ponytail. He was wearing a black jacket and jeans.

Anyone with information is asked to contact Detective Constable Kerry Meacher at Islington police station on 020 8345 0158 or via 101. Alternatively, they can call Crimestoppers anonymously on 0800 555 111.

Enquiries continue.

A 17-year-old boy has been charged in connection with the investigation.