Fire crews were called to the warehouse located in the 1900 block of West Main Street around 6:30 p.m.
An explosion was heard before the fire, according to officials.
No injuries were reported.
Crews left the scene around 5 a.m. on Thursday.
The cause of the fire remains under investigation.
The retail storefront was undamaged.
Weaver Nut Company has been at that location in Clay Township for nearly 50 years.
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