ST. LOUIS (KTRS) The children of a woman who was among four people killed when a steam-filled tank weighing nearly 2,000 pounds (900 kilograms) exploded at Loy-Lange Box Co. in April and flew onto a building are suing the plant.

Online court records show that Tonya Gonzalez’s children, Nathan and Nicole Favignano, filed the wrongful death lawsuit last week in St. Louis Circuit Court against Loy-Lange Box and five other companies.

The April 3 explosion inside the Loy-Lange plant killed a worker there. The tank then flew into nearby Faultless Healthcare Linen, killing Christopher Watkins, Tonya Gonzalez-Suarez and Clifford Lee.

Watkins’ father and sister, as well as seven Lee siblings and one of his brothers, already are separately suing Loy-Lange over the blast.

Loy-Lange declined to publicly comment on this latest suit.

(Photo courtesy of Fox 2)