Fire crews attended a Winchester city centre shop after a smoke cloak was activated.
The incident was at Tesco Express in High Street at around 10.30pm on Thursday July 27.
On arrival, fire crews confirmed there were no signs of fire and ventilation fans were used to clear the smoke.
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A Hampshire Fire Service spokesman said: "Winchester and Eastleigh firefighters were called to the Tesco store on the High Street at around 10.30pm last night.
"There were no signs of fire but heavy smoke logging throughout caused by a smoke cloak.
"HIWFRS used ventilation fans to clear the smoke before returning to station at 11.20pm."
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