The ‘Journal’ has obtained video footage of the fire that destroyed Poundstretchers in Bishop Street in the early hours of Thursday morning.
Amateur photographer, Sean Campbell, was one of the first on the scene and his video footage shows fire fighters battling the blaze which is believed to have started at around 1:30am.
The Northern Ireland Fire and Rescue Service (NIFRS) confirmed 50 fire-fighters attended the scene.
The ‘Journal’ understands 100 gas canisters were inside the premises and exploded although there are no reports of any injuries.
The NIFRS said their officers had prevented the blaze from spreading to businesses on either side of the scene of the fire. As yet, the cause of the fire is unknown but substantial damage has been caused to the building.