Pasadena Fire Department is responding to fire at container plant

The Pasadena Fire Department is responding to a fire at a container yard.

First responders received an initial call about an explosion in the 5000 block of Underwood at the Schutz Container System.

The fire is said to have been a chemical reaction during a cleaning process.

The fire has been put out, but investigators cannot go inside the building until it is determined what chemicals caused the fire.

2 firefighters were transported to Bayshore Hospital. Their conditions are unknown at this time.