MINNEAPOLIS (WCCO) — A fire investigation is underway after a fire at a waste management building caused more than $800,000 in damage in Stearns County.

According to the Stearns County Sheriff’s Office, the shed fire was reported at around 10:51 p.m. on Dec. 26 at Tom’s Refuse, which is located at 38164 Thunder Road in Millwood Township.

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There, authorities say 58-year-old Keith Frank of Pequot Lakes was staying in a camper near the shed. He lost power and went to check on the electrical break system, and then noticed the shed was on fire.

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The shed, and its contents, were heavily damaged. There were no injuries.

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The exact cause of the fire is not known and is under investigation by the State Fire Marshal’s Office.