Guernsey Police are investigating after 'significant damage' was caused to the windows of the Northside Chippy on the Bridge.
Officers believe the incident occurred around midnight on Sunday (17 November).
The eatery owners, who reopened less than a week ago, took to social media to inform customers it would keep trading.
Anyone with relevant information or dash camera footage is asked to contact police on 222 222 or to contact Crimestoppers anonymously.
Sensitive demolition at Guernsey's largest building site to begin soon
The remaining buildings at Leale's Yard off the Bridge will be demolished carefully over the coming winter.
Guernsey big screen for World Cup Semi-Final sold out
A large outdoor screen will be set up along the Crown Pier for football fans to watch England vs Argentina.
Hundreds protest against a goods and services tax for Guernsey
Islanders rallied in Market Square to hear from the deputies who are against GST.
Donations page set up for Sark's volunteer firefighters
The community rallies to fight the first major fire incident ever declared on Sark.
Firefighters tackle gorse fire at La Corbiere
A wildfire has broken out on the headland at La Corbiere in Guernsey.
50 people evacuated from scene of fire in Portbail-sur-Mer
Smoke from the fire near the French coast could be seen across Jersey.
'Pause before paying' to avoid being scammed, islanders urged
Financial regulators in the Channel Islands are urging people to take extra care before sending money or sharing financial information.
Five Guernsey firefighters injured while travelling to assist with Sark fire
An update from emergency services confirms that five Guernsey firefighters received "non-life-threatening injuries" shortly after arriving in Sark.
