On Friday 27 November, two people are reported to have got out from their cars to confront each other outside Balthazar.
It happened at 10:20 on the Quay and involved the driver of a large black car and smaller blue car. Guernsey Police is now investigating the incident.
If you have any information you’re asked to contact PC 174 Potter on 725111 or, alternatively, you can call Crimestoppers anonymously on 0800 555 111.