FIREFIGHTERS were called to the former Kwik Save supermarket in Deane Road, Bolton, in the early hours of Sunday.
Youths are thought to have set fire to a bin at around 5.30am which spread to the canopy.
Firefighters had to break into the building, part of which is boarded up, after the blaze spread to metal roller shutters.
The crews managed to stop the fire from getting inside the building and they were on the scene for two hours.
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