Arson cause of Fort Mill fire that sent fireworks soaring into the air

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Photo/Video: Michael Stechschulte

A fire that sent fireworks soaring into the air early Thursday morning and destroyed at least two containers of fireworks stored for sale on the Fourth of July has been ruled arson, according to Fort Mill authorities. 

The fire broke out around 5:45 a.m. Thursday, July 4 at Davey Jones Fireworks located at 3420 US-21. According to the York County Sheriff's Office, the fire started in containers outside the store. 

The blaze provided for an impressive, though sparsely attended show as shells and rockets burst through the metal containers, sending colorful showers into the air. 

Related: 'Spectacular fire' destroys at least 2 containers at fireworks store

"I was pretty shocked. I thought it was a sales thing or display for the 4th then I saw the flames out of the top. I don't think people realized it was an actual working fire," Michael Stechschulte said. 

Firefighters actively worked to extinguish the large flames Thursday as multiple fireworks exploded. 

Fire officials on scene called the incident "A once in a lifetime fire." 

The Davey Jones Fireworks building wasn't damaged. It's unclear how much product was lost when the storage containers went up in flames. This remains an open and ongoing investigation.