Two fire engines were called out to the River Island store in Great Yarmouth town centre this morning after a light overheated.
Smoke was seen coming from a light fitting, leading to the crews from Yarmouth being sent out with nine firefighters on board.
Yarmouth fire station manager Jon Wilby said a couple of firefighters and staff isolated and dealt with the light fitting.
He added it was the second time in two years that crews had been called to the store to deal with a problem of overheating lights.
The call out to the Norfolk and Fire Rescue Service came in at 9.44am to the store at King Street.
The ground floor of the store re-opened shortly afterwards and the lower floor was closed off until further notice.
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