We are asking anyone who was at the Mountbatten Centre in Portsmouth on Saturday (23 March) who has mobile phone footage of, or witnessed, a public order incident at about 9.50pm to contact us.
A 46-year-old man was treated for cuts and bruises following a dispute between two groups of people.
If you have mobile phone footage please email it to OPEDGEHILL@hantspol.gov.uk
If you saw what happened or know anyone that was involved please call 101 quoting Op Edgehill / 44190101842.
Alternatively you can call Crimestoppers anonymously on 0800 555 111.