At around 11pm, an altercation between two groups took place on Eastleigh High Street, leaving a man in his 20s with serious, but not life-threatening, injuries.
Officers believe there were a number of key witnesses in the area who may have information that could assist our enquiries.
Police would like to speak to anyone who was in the area at the time and may have seen or heard anything.
Police would also like to speak to anyone who has CCTV or dash cam footage of the area at the time.
A 17-year-old boy from Eastleigh was arrested on suspicion of Section 18 grievous bodily harm.
All four remain in police custody at this time.
Anyone with information should call 101 quoting 44210156231.
Alternatively you can contact independent charity Crimestoppers anonymously on 0800 555 111