EAST TEXAS (KLTV) - State authorities have taken over the investigation into an explosion at an East Texas plant that killed one person and injured four others.
The explosion happened around 4 o'clock Friday afternoon at Lone Star specialties on highway 259 in Lone Star.
Police say 44-year-old William Rudd of Oklahoma was killed in the blast.
Police and fire responded quickly to the explosion site to find the twisted metal of a tank investigators say blew up.
A blast that locals say could be heard for miles.
"I didn't know what happened, I walked outside, I thought an 18-wheeler from next door might have hit the building," says Lone Star resident, Donald Thompson.
Four other people were hurt and treated at area hospitals.
The blast rattled the building that Thompson was working in a half mile away.
"It was a loud boom, and it even shook the building. I thought we gonna get blown up," Thompson.
State fire marshals arrived and began their investigation, though no details have been released on exactly what caused the explosion.
A drone was brought in to give an aerial view of the blast area.
The state fire marshal's office is investigating what the conditions were that led up to the blast.
The Texas Rangers, Champion EMS, Lone Star fire department, Morris County sheriff's deputies assisted at the scene.
The state fire marshal's office is working to determine exactly what sparked the blast.