An explosion at a Cincinnati business injured two people and prompted HAZMAT units to respond early Friday morning.
Emergency personnel were called to the site of the explosion at Environmental Enterprises Inc. at approximately 4 a.m.
Four men were shredding an industrial filter containing sodium chlorate, which is sensitive to friction, causing a flash fire, officials said.
Two people were injured as HAZMAT and fire crews work to extinguish any hot spots as a result of the explosion.
One person suffered serious injuries and another is stable, fire officials said. Both were taken to University of Cincinnati Medical Center. The two men injured are in their late 20s to early 30s.
Roads are closed in the area as authorities work to clear the scene.