MIDFIELD, Ala. (WIAT) We are following breaking news of an explosion at a business in Midfield that sent 3 people to the hospital.
It happened at Hot Metal Coating located on Industrial Blvd just before 2 p.m.
WATCH : Midfield Explosion update
According to Battalion Chief Sebastian Carrillo, Birmingham Officials received a call for mutual aid on a hazmat explosion.
AIR 42 LIVE: AIr 42 shows a live look at the explosion site in Midfield, where 3 people were taken to the hospital.
Authorities say the chemical substance is calcium silicon, which is used in pipe making processes. There are 500,000 pounds in the building. Officials say the chemical could pose an inhalation hazard.
WATCH: Emergency crews on the scene of an explosion at a business in Midfield. 3 people taken to the hospital.
Officials say the injuries are not related to the substance. The 3 people who were rushed to the hospital suffered from muscular injuries related to possible falls.
According to Battalion Chief Sebastian Carrillo, Birmingham Fire and Rescue crews are helping the Midfield Fire Department with a fire at this location as well.
WATCH: Emergency crews on the scene of an explosion at a business located in Midfield
This is an ongoing investigation.