MINNEAPOLIS (WCCO) — Officials closed off Waite Park City Hall, just before 7 a.m. on Thursday, after police officers discovered a “haze of smoke and a smell like burnt wire or rubber,” inside of the building.

A news release says the smell came specifically from the police headquarters area inside of city hall.

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Law enforcement cleared the area of all personnel and called the Waite Park Fire Department to the scene to investigate.

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Eventually they determined that the smoke was caused by a motor going bad inside of a HVAC system.

City hall employees are working in alternative locations for the day — they’ll be allowed back inside the building on Friday morning.

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The building had already been closed to the public because of COVID-19.