Four fire engines have been sent to a fire at the old planning offices at South Hill.
A total of 18 firefighters are on the scene in St Helier this afternoon (3 January).
An Incident Command Vehicle and Fire Duty Manager have also been dispatched.
The fire is said to be on the first floor of the former offices.
Footage posted online shows smoke coming from the building.
People are being asked to avoid South Hill, as the road is closed at both ends.
Haut Du Mont Trial: 'It could explode', jury hears 999 calls
Jurors have heard the 999 call made by Haut Du Mont resident Louisa De Almeida, reporting the smell of gas inside her flat, hours before the explosion that killed her and nine others in December 2022.
Haut Du Mont Trial: Worker checking gas valves spent almost 'entire' time on his phone
The supervising engineer of gas works that led to a fatal explosion at Haut du Mont was distracted when he attended the flats to check valves were closed, Jersey's Royal Court has been told.
Red Arrows still expected for Jersey Air Show
The Red Arrows are still expected in Jersey tomorrow (10 September), despite pulling out of tonight's Guernsey Air Display.
Haut Du Mont Trial: Gas works were 'sloppy, unsafe, and cut corners', allege prosecutors
A jury has heard claims the gas work undertaken in the area around Haut Du Mont on the day before a fatal explosion four years ago was rushed, based on 'guesswork', and 'sloppy'.
26 Victoria Village homes get planning permission
26 new homes will be built in Victoria Village, after a successful planning appeal.
Haut du Mont trial: Explosion 'an incident waiting to happen'
A court has heard the Haut du Mont explosion nearly four years ago, which killed ten people, 'was an incident waiting to happen.'
Jersey flights impacted by UK air traffic control issue
Some flights between Jersey and the UK today (8 September) have been cancelled or delayed because of an issue with UK air traffic control.
Engine fault sees private jet diverted to Guernsey Airport
Guernsey Airport operations were disrupted for an hour when a Jersey-bound jet made an emergency landing.
