No one hurt in Muskegon County factory fire

The metal building in the 2500 block of South Slocum Road housed Cast Metal Core. The Ravenna company makes sand cores for foundries. Fire officials said a wall heater ignited combustible materials that were too close to the unit.

Three adults, including the building'’s owner, were inside when the fire started. Two adults were living inside a small office inside the building. All three were uninjured, authorities said.

Heavy smoke could be seen for several miles and filled another building next door to the factory.