Shoppers had to flee after a huge fire broke out at a B&M store in York.
The store, in the Clifton Moor retail park, was evacuated after the blaze began in the storage yard of the variety retail outlet on Saturday afternoon.
Police declared a major incident, closing the road between Wigginton and Clifton Moor as billows of smoke threatened visibility and created hazardous conditions for drivers.
"Smoke is causing issues meaning there are road closures in place out to the A1237," North Yorkshire Police said on Twitter.
It said "all emergency services" were in attendance at the scene.
Residents have been urged to remain indoors and close their windows.
Footage from the scene showed thick, grey smoke dominating the skyline, with shoppers looking on from a car park in clear view of the flames.
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Police said a cordon would be in place for "some time".
Yorkshire ambulance service said staff had attended the scene, but no-one was admitted to hospital.