The incident happened at 00:30 on Sunday 27 December while two people were waiting outside the restaurant.
Guernsey Police are looking to speak to anyone who may have seen what happened.
They would especially like to speak to anyone who may be able to identify the unknown assailant. He assaulted a male and a female while they waited outside.
If you have any information please call the police on 725111 – alternatively you can call Crimestoppers on 0800 555 111.
Pictured top: The incident happened outside the restaurant on St George’s Esplanade.
