** No Media Coverage – Fire Department Reported ***  Around 1029 hours on Sunday, the Libertyville Fire Department responded to an activated fire alarm at a plastic manufacturing plant. When the first in engine company arrived, the firefighter in the jump seat thought he saw smoke from the building. After accessing the building and alarm room, he crew found the sprinkler bell ringing. After opening a man door into the warehouse they noticed a heavy haze of smoke. At this time the response was upgraded to a structure fire response. The crews made entry via the north side door and found one sprinkler head activated. This sprinkler was controlling a fire that involved a plastic injection molding machine. The crews used one handline to finish extinguishment and mop up. Fire damage was contained to the machine, while other parts of the building sustained smoke and water damage. ***