The remains of at least some of the seven who are missing have been found at the site of Tuesday's deadly fireworks warehouse explosion in Yolo County, Calif.

Rescue crews were searching on Thursday for seven people still missing days after an explosion at a fireworks warehouse in Northern California shook a tiny farming community and forced the cancellation of nearby July Fourth celebrations.

The company indicated that multiple people died in the incident three days before the Fourth of July, but officials have not issued a determination.