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.
Alleged road rage assault on Christmas Eve
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Jersey's first Christmas Tractor Run raises more than £10k
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Finish line looms for school's Advent Challenge
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£1 million into Jersey sport in 2026
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Channel Islands could technically have a White Christmas
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Cocaine importer jailed for six years 9 months
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Details announced of free childcare for two and three year olds
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18-year-olds to have access to Jersey social housing
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