ST. JOSEPH COUNTY, Ind. -- Four firefighters were injured while fighting the fire at UFP Industries on Sunday, according to Clay Fire.

All four were taken to the hospital and were released later in the evening.

Three suffered heat-related injuries. Another was taken to the hospital for a broken foot.

Firefighters were dispatched to UFP on Herbert Street just after noon on Sunday.

There was heavy smoke from the north side of building 8. Firefighters were able to contain the fire to the north side of the building, preventing it from spreading to several adjacent buildings.

The cause of the fire is under investigation.