Shortly after 11pm on Thursday, July 3, firefighters were alerted to a shed fire on Quayside Road.
Crews from St Marys and Hightown arrived at the scene of the blaze to find smoke and flames issuing from a shed and the adjoining outbuilding.
Hampshire Fire and Rescue Service confirmed a gas cannister was removed from the “risk zone” before firefighters used hose reels and jets to douse the flames.
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Ventilation fans were in operation to disperse smoke as crews dampened down the scene.
In a statement, a spokesperson for Hampshire Fire and Rescue Service said: “The St Mary’s and Hightown crews arrived to find smoke and flames issuing from a shed and the adjoining outbuilding on Quayside Road.
“Hampshire and Isle of Wight Rescue Service returned to station at around 12.30am.”