A Phoenix, Arizona Walmart was evacuated after a group of people set off fireworks inside the store.
Fire crews were called to the store at about 8:30 local time Wednesday after employees and customers reported the blaze.
The fire was extinguished before it spread to a nearby display of charcoal, lighter fluid, and propane. The flames left a layer of floor to ceiling smoke inside the store along with extensive water and smoke damage.
Fire investigators believe three or four people were involved in setting the blaze.
Police are now looking for suspects.