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Beyond that, local officials cited the ongoing criminal investigation led by the Office of the State Fire Marshal. Investigators from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives, as well as Cal-OSHA and others, are also investigating what unfolded in the late afternoon July 1.

The deadly explosions at a fireworks facility in Esparto on July 1 were visible from space. Meteorologist Dirk Verdoorn saw satellite imagery capture an initial plume of smoke and two more big puffs of smoke as explosions occurred.