Police and fire crews responded to the Walmart on the South Belt Highway in St Joseph over the noon hour on Wednesday. Officials say a Digiorno Pizza delivery truck caught fire in the loading dock. Customers were moved to the front of the store, and some left during the ensuing firefighting effort.

The fire is put off a lot of smoke, and that has many passersby concerned.

Inspector Jason Ziph of the St Joseph Fire Department says the truck’s engine caught fire, and soon the vehicle was fully engulfed in flames. Ziph says heat from the fire ignited the contents of a semi trailer parked next to it. Witnesses reported popping sounds coming from the second truck, but Ziph says it’s not clear if there was ammunition on the manifest.

One firefighter suffered a laceration on his hand that required stitches. Ziph says that firefighter is fine, and was expected to return to work on Thursday.

The fire was reported at 12:47 p.m. Wednesday at the Walmart at 3022 South Belt Highway.