Police are appealing for more witnesses to come forward after a fight brought traffic to a standstill in Leicester.
About 30 people were involved in the disturbance which started on Moira Street and spilled into nearby Melton Road, at about 2030 GMT on 22 March.
Five men were arrested on suspicion of affray but were later released on bail.
It is still unclear what prompted the incident in the Belgrave area, which left some of those involved requiring hospital treatment for minor injuries.
Earlier skirmishes were also reported at a nearby Sainsbury's supermarket and at Allington Street park.
Of the people currently identified, three were aged 16, one was 24 and the other was aged 28.
Det Insp Rob Widdowson, of Leicestershire Police, said: "We will not tolerate this sort of behaviour in the city and we are carrying out a thorough investigation to bring those responsible to justice."