A chemical plant worker is dead, after an early morning explosion today in Houston that left six others hurt.

The body of the worker was found about seven hours after the blast at the Goodyear Houston plant.

The explosion also caused a small release of ammonia. It's used as a refrigerant.

The six injured people were treated on-site by the plant's medical team, and then taken to local hospitals for evaluation.

There were about 200 people in the plant at the time. The facility was evacuated for several hours after the explosion.

Plant officials are investigating the cause of the explosion and trying to determine how much ammonia was spilled.