Officers said the assault took place in Havana on Bath Street around 01:50 on Saturday (1 June).
Pictured: Havana’s entrance is based on Bath Street, St Helier, opposite Graeme Le Maistre Sports.
“The suspect in this assault struck the victim over the head with a glass causing serious injury,” they said in a statement appealing for witnesses.
Can you help?
Anyone who saw what happened or who has any other information is asked to contact police on 01534 612612.
Anonymous reports can also be made via Crimestoppers by calling 0800 555 111 or using their online form.
Witnesses should quote police reference number M04515/2024.
