Omaha officials say two people are dead and all other workers are accounted for in the animal feed plant that exploded.
The explosion Monday morning brought down part of the International Nutrition plant. Two people were killed and 10 others seriously hurt.
Omaha Police Lt. Darci Tierney said all of the other people who were working have been accounted for.
Authorities don't know what caused the blast.
Interim Omaha Fire Chief Bernie Kanger noted that there were no hazardous chemicals at the plant.
The Occupational Safety and Health Administration will determine the cause.
The explosion knocked out the lights in the building and sent workers scrambling for safety.
Worker Jamar White said he heard a loud crack and looked up to see the back wall of the building collapsing. White said he then ran to safety.