Authorities in Nebraska said three people remain unaccounted for following an explosion at a fuel pellets plant in Fremont.

Three people remain missing after a massive explosion at a Nebraska plant Tuesday left crews battling a fire for hours. The explosion happened at the Horizon Biofuels plant in Fremont. The plant makes animal bedding and wood pellets for heating and smoking food.

FREMONT, Neb. (KSNW) — Authorities are on the scene of a large explosion at a Nebraska biofuels company. It happened early Tuesday afternoon in Fremont, a town about 20 miles northwest of Omaha. A company called Horizon Biofuels is the listed business at the address where the explosion took place.