Police are appealing for witnesses and information following an altercation in Stevenage.
The incident occurred between 1.45am and 2.10am on Sunday 22 October when it is reported that a large fight broke out on Primett Road, close to Townsend Mews.
Several people are believed to have been involved, with one person struck over the head with a glass bottle.
Three men, aged 18, 21 and 22, and one woman, aged 21, all from Stevenage, have been arrested on suspicion of affray in connection with the incident. They have all since been released on police bail while enquiries continue.
Detective Constable Darren Lomax, who is investigating, said: “Our investigation into the incident is ongoing and we are appealing for anyone with information to please come forward.
“If you saw anything, or have any further information that could assist our enquiries, please contact police if you haven’t done so already. You can email me, or report information anonymously to Crimestoppers.”