LOUISVILLE, Ky. (WDRB) -- A GM metal stamping plant exploded in Marion, Indiana Tuesday, killing one person and injuring five others.

"We just heard a big boom and everybody went running to find out what the problem was," said Dwayne Stamper, an injured employee. "Then we saw gas throughout the air -- security and everybody came over and done everything they could as quick as we could."

James Gibson, a 48-year-old contractor at the plant, died. Everyone else is expected to be okay.

The factory makes fenders, doors and hoods for General Motors vehicles.

The plant is back open today, but the explosion is still under investigation.

Copyright 2014 by WDRB News. All rights reserved.