Around 20 flats in the Springfield area have been evacuated due to a potential gas leak.
Island Energy and the Fire and Rescue Service are currently on scene responding to the incident at Le Geyt Estate.
A spokesperson for the utility company said the evacuation of residents was "precautionary".
Island Energy said: "Island Energy engineers are currently working in the Le Geyt Estate area, responding to a potential gas escape.
"Our team follow a very strict policy and procedure in the event of a gas escape and, when called to attend, use highly sensitive gas detection equipment, and follow a thorough investigation process on all call outs.
"We monitor inside and outside properties within a wide radius to ensure safety.
"Working with Jersey Fire and Rescue, our engineers are currently on-site working to locate, and if found repair, any gas escape.
"The evacuation of homes and properties in the vicinity, in this case around 20 flats, is precautionary, and again is best practice in these situations.
"We would like to thank the residents of the area for their understanding and co-operation and reassure them we are doing everything possible to get them back into their homes as quickly and safely as possible."
The Fire Service asked islanders to avoid the area.
St Saviour's Road remains open, but is down to one lane.
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