Police officers were called to a fight in the early hours of Sunday morning in Norwich's clubland.
Officers were alerted to a fight outside Rose Lane Car Park, off Prince of Wales Road, at 1.45am on Sunday (October 24).
When they got there, the people had all left and the force is now investigating an ABH (assault occasioning actual bodily harm).
A member of the public said there were delays in the police arriving at the scene.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here