The barrage of fireworks that exploded Tuesday caused a massive blaze that led to other spot fires and collapsed the building in Yolo County, which lies about 40 miles (64 kilometers) northwest of Sacramento.

Seven people were "unaccounted for" in Yolo County's town of Esparto after several explosions at a fireworks warehouse resulted in a fire, officials said.

Authorities say they have discovered the remains of seven bodies, the same number of people who had been reported missing.