Police were called after reports of a group of men fighting in Wellingborough town centre.
Officers went out following reports of up to six males fighting in and around the Knox Road area of the town between 5.30pm and 6pm on Tuesday, September 29, although police have only just released details of the incident.
Police want to hear from anyone who was in the area that night or has any information about those involved.
A police spokesman said: “There were about five or six, white and black males in the group, believed to be in their mid-teens to early twenties.”
Witnesses or anyone with information is asked to contact Northamptonshire Police on 101 or call Crimestoppers anonymously on 0800 555111.