MANITOWOC, WI (WTAQ) - Authorities in Manitowoc are investigating a series of explosions and a fire that destroyed an out-building at the CherMak Sausage plant.

No one was injured.

Firefighters were called around 4:30 Sunday morning. Battalion chief Ken Cayemberg said a corner of the building was engulfed in flames when his crews arrived – and explosions were still taking place.

The out-building was destroyed. No one was inside when firefighters arrived.

Crews used a forklift to remove pallets of cardboard that were inside. There’s no word on what caused the fire – and a dollar-estimate of damage was not immediately determined.

CherMak is a family-owned company that makes a host of sausage products that includes hot dogs, brats, summer sausage, and ring bologna.