Officers are appealing for information following a report of a fight in Billingshurst.
Police were called to Roman Way at around 12pm on 27 May to a report of a group of teenagers fighting in the street.
An 18-year-old boy from Pulborough, and two 17-year-old boys from Billingshurst were arrested on suspicion of affray. They have been released on bail, pending further enquiries.
Witnesses or anyone with any information or footage is asked to contact police online or call 101 quoting serial 533 of 27/05.