HAYWARD, Calif. —

A gas explosion set off a major fire in a San Francisco Bay Area neighborhood on Thursday after obliterating at least one home, blowing out windows and shaking nearby houses. Six people were taken to hospitals for injuries, fire officials said.

Dramatic video footage showed a home in the Hayward area sitting under a blue sky when it suddenly exploded, spewing jagged wood and other debris into the air as smoke billowed.

Alameda County Deputy Fire Chief Ryan Nishimoto said he did not know if those injured were workers or residents, but he said three people were immediately sent to a hospital due to their injuries and three others who were sent had more minor injuries.

Three structures on two separate lots were severely damaged, said Alameda County Deputy Fire Chief Ryan

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