Crews in Adams County battled a blaze outside Friendship Hardwoods Wednesday night.
Investigators say a semi truck, parked outside the building, caught fire.
The truck was storing sawdust... and it appears it combusted.
The company uses sawdust to heat its building... and several trucks full of it were parked close together.
Officials say the fire caused $30,000 in damage.
1908 Grand Avenue, Wausau, WI 54403
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