A man was sexually assaulted by another man while he was walking home from a night out.
The attack happened near Goals 5-a-side at Millbrook Park, Southampton, at about 0200 GMT on Friday.
The 32-year-old victim had been verbally abused by a gang of about five men before some of them drove off.
Detectives said two of them then followed him before he was threatened with a knife and sexually assaulted. Police are appealing for witnesses.