MADILL-MARSHALL CO., OK (KXII/CNN) - Federal investigators Tuesday are trying to figure out what caused Monday's deadly plant explosion.
The blast left two men dead, another man burned and a community in shock.
"Just frightened and scared and panicked and crying," Debra Garrett said after hearing about the explosion at the Mid American Steel & Wire Plant Monday afternoon. She immediately began to fear for her sons' safety.
"I was at home. Both my sons work there, one in the morning, one in the evening," she said.
She said she was able to reach one of the brothers, who let her know they were both OK but were unsure about their coworkers.
"They said that one other foreman's sons [were] in the explosion, and that's all he knew at that time," Garrett said.
"While in there, [the responders] discovered two deceased people. It was reported to them that another had been taken by employees to Marshall Memorial Hospital," Marshall County Sheriff Ed Kent said.
The man injured was treated and released from the hospital, Kent said.
The names of the two men killed are not yet being released.
"One of the gentlemen, I understand, is a local. He's from Madill, and the other one is from Durant," Kent said.
The sheriff said the explosion is known as a BLEVE, which stands for Boiling Liquid Expanding Vapor Explosion.
A furnace exploded Monday due to a gas buildup. State and local authorities are looking into how it happened.
"OSHA is here with the fire marshal," Kent said. "We have a couple [of] deputies there with them to assist however we can in the investigation."
Kent says the tragic incident has shaken the community.
"This is one of the first factory deaths that I know of in Marshall County," he said.
Garrett said her sons will be approaching work differently after yesterday.
"It did. It scared them both," she said.
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