COLUMBIA, SC (AP) - A widow of a Richland County man who was killed in a plant explosion has filed a suit against his employer.

News outlets report the widow of 63-year-old Alton Ray Zeigler, a retired master sergeant in the U.S. Army, filed a wrongful death suit in federal court Wednesday against Eastman Chemical Co.

The suit alleges a fire during leak repair efforts on a pipeline altered the chemical makeup of the pipeline by converting liquid to gas.

Related: 1 Dead, 2 Injured After Workplace Accident at Calhoun County Plant

According to the suit, when Zeigler's team loosened the pump bolts the built-up pressure blew the nearly 300-pound pump and spewed some 500 gallons of pipeline contents in the work area.

The suit contends the company knew or should've known of the risks posed.