ELKHART COUNTY, Ind. -- Baugo Township Fire Department reports crews responded to a fire alarm activation at a commercial manufacturing facility around 11 p.m., Thursday.

Firefighters arrived to find smoke coming from the building's back corner.

Fire officials say crews entered the building with zero visibility, with smoke from floor to ceiling.

Firefighters used a thermal imaging camera and followed the sound of the sprinkler system to find the fire's source and extinguish it.

The report stated the sprinkler system successfully confined the fire to one area.

The cause of the fire remains under investigation.

Crew members from BTFD will return Friday to continue investigating.

Due to the building's large size firefighters remained on scene to assist with ventilation and smoke removal.

Concord Township, Cleveland Township, Harrison Township, and Penn Township Fire Departments, along with Wakarusa Fire and EMS also responded to assist.

No injuries have been reported at this time.