One person has been pulled unconscious from a burning fourth floor flat in St Helier.
Fire crews were called out to Hilary Street at about 9.30pm last night, after neighbours were alerted to the blaze by a smoke alarm.
Two fire engines were sent to the scene and crews quickly established that the flat was heavily smoke logged.
A breathing apparatus team entered the property to find an unconscious casualty, who was immediately taken outside for treatment.
Another fire engine was then called to the scene to help extinguish the blaze.
The casualty was taken to hospital by ambulance for further treatment.
The extent of their injuries is not yet known.
Jersey Fire and Rescue remained on the scene for about two hours, ensuring the fire was out and conducting preliminary investigations.
Further investigations to identify the cause are underway.
Islanders asked for opinions on regulation of medical services
Michael Rosen to appear at Jersey Festival of Words
Nine runners to take on London Marathon for Jersey Hospice
Survey opens into how to stop Jersey children vaping
Politicians vote to go ahead with Jersey wind farm project
'Serial fraudster' wanted by States of Jersey Police
Jersey takes final steps to independent taxation
Jersey could host Island Games in 2035