Recovery efforts continued Tuesday after a manufacturing plant explosion in Omaha, Neb., that killed two workers and hospitalized 10 others with serious injuries.
This morning, the International Nutrition plant is a twisted, dangerously unstable wreck. Key structural supports failed after the blast, and the second and third floors of the plant collapsed on top of the first floor. The blast knocked out the lights in the building and sent workers fleeing for safety.
Investigators still aren't sure exactly what happened – and now they're trying to solve the deadly mystery.
Omaha Interim Fire Chief Bernie Kanger said the investigation could take weeks. He also noted there were no hazardous chemicals at the plant, which makes products that are added to livestock and poultry feed to make them more nutritious.