It has been one week since the explosion rocked this tight-knit community, beginning a massive investigation into what caused the deadly blast by the State Fire Marshal’s office.

Authorities raided a San Francisco home in connection with the deadly fireworks explosion that killed seven people in the Yolo County community of Esparto on July 1.

Cal Fire's state fire marshal was leading the investigation at the Inner Richmond home on 2nd Avenue, between Geary Boulevard and Anza Street, a Yolo County spokesperson said.