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.
Engraved cobble stones pay tribute to islanders persecuted under the Nazis
20 engraved cobble stones, called 'stolpersteines', are being laid in Jersey today, to commemorate islanders who were persecuted, imprisoned or deported by the Nazis during the occupation.
Fundraiser for Jersey Rescue Dogs to help them through 'busy season'
A fundraiser is taking place in St Helier today to raise money for Jersey Rescue Dogs and Our Shelter Halkida in Greece.
Three disabled islanders seek help decorating their wheelchairs for Battle of Flowers
Three residents at Jersey Cheshire Home are looking for volunteers to help them decorate their wheelchairs.
Snapping a pic of a 'Local Icon' could win you £100
Islanders are invited to take photos of 'Local Icons' as part of the My Island photography competition to win prizes.
'Summer in the Park' big screen to show free Olympics, F1 and film nights
The big screen in Howard Davis Park will now be used to show a variety of sporting events and cinema this summer.
Inflation shrinks again in Jersey to 5%
Inflation has fallen to 5% in the three months to June 2024.
