Spring Grove fire crews responded just after 2:45 a.m. to a fully involved structure fire in the 900-block of Main Street.
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Dozens of fire departments helped Spring Grove firefighters extinguish the blaze, as there was a lack of fire hydrants in the area.
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The Spring Grove fire chief said firefighters found one person deceased on the scene. Fox Lake fire officials confirmed a man, who was the sole occupant of the one-story ranch-style home, died.
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The Fox Lake Fire Protection District is investigating the incident, but it does not appear suspicious.
Main Street was closed between Wilmot Road and Edgewood Court during the incident.