The leak in Hayward, Calif., started after a construction crew struck a Pacific Gas and Electric underground gas line, according to the utility.

At least six people were taken to the hospital Thursday morning after a massive explosion caused a large fire in Hayward, California, fire officials say.

An aerial view shows the damage after an underground gas explosion occurred on Thursday, injuring six people in Hayward, Calif. (Tayfun Coskun / Anadolu via Getty Images) A natural gas line leak ...

An explosion in Hayward on Thursday that rocked a normally peaceful neighborhood was captured in dramatic images, from photos on the street to a doorbell camera video that showed the moment the blast ...

A gas explosion in the San Francisco Bay Area destroyed homes and injured six people. Dramatic footage shows the moment a house exploded in Hayward.