Police and fire crews are at the scene of a structure fire at Stirling North, according to SA Police.
Emergency services responded to reports of fire and smoke coming from the disused hardware store on Footner Road, Stirling North about 11am on Thursday 26 May.
MFS crews are still fighting the blaze, which has engulfed the premises.
There was no one inside at the time of the fire.
The fire is not threatening nearby properties.
The cause of the fire is not yet known. Fire cause investigators will attend the scene from Adelaide and are expected to arrive this afternoon.
Anyone with information that may assist the investigation into the fire is asked to contact Crime Stoppers on 1800 333 000 or online at http://crimestopperssa.com.au