Firefighters were called out to HMP La Moye on Saturday night to tackle a blaze in the prison kitchen.
Prison staff called 999 shortly after 8pm, and all the emergency services were dispatched as a precaution.
The fire was put out a short time later.
No one was injured during the incident, and the Prison Service says there is 'no suggestion' of any suspicious activity or the fire being started deliberately.
Contingency plans have been brought in to make sure prisoners are being fed as normal.
25% of Jersey A-level grades A-A*
A quarter of all A-level grades in Jersey have been marked as A or A*.
Jersey community unites out west for solar eclipse
Thousands of islanders basked in the August heat to watch the once-in-a-generation partial solar eclipse.
A-level results day: "The grades you get don't define you"
It's that time of year again... A-level results day!
Invite to 'Sponsor a Brave Bear' for families facing off-island treatment
A new campaign has been launched to strengthen support for Jersey families facing off-island treatment journeys.
Travel problems persist for some Jersey residents
Jersey's Home Affairs Minister says the government is continuing to press for action to prevent some passengers being denied boarding following the introduction of the UK's Electronic Travel Authorisation scheme.
The solar eclipse in Jersey: All you need to know
A rare solar eclipse - where the moon covers the sun, blocking its light - will start at around 6:15 pm this evening (12 August).
£1.2m in fines for missed Income Tax deadline
Around 4,000 will be getting a £300 fine for not filing their 2025 tax return in time.
One in eight Jersey heatwaves has happened this year
With the island entering a fourth heatwave of this summer, 1 in 8 of all heatwaves in Jersey since records began 132 years ago have occurred this year.
