An eyewitness captured the footage, which showed crews spraying water at the Horizon Biofuels plant in Fremont, Nebraska, northwest of Omaha.

The explosion occurred midday Tuesday at Horizon BioFuels, a manufacturer of fuel pellets and animal bedding located in Fremont.

FREMONT, Neb. -- The remains of two girls and a relative who were killed in a massive explosion at a Nebraska biofuel plant were recovered Wednesday after crews battled smoldering wreckage and an unstable building for more than 24 hours.