Two 21-year-old men have been treated for head injuries following an early morning altercation outside a Northampton bar.
The incident took place in Angel Street outside the Balloon Bar at around 4am on Saturday, February 11.
Six men were initially involved and two women appeared to join them as the altercation started.
Anyone with information is asked to contact Northamptonshire Police on 101.
Alternatively, they can call independent charity Crimestoppers anonymously on 0800 555111.