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

Officials learned of the leak around 7:30 a.m., but nearby homes were not evacuated when a massive explosion struck two hours later.

A doorbell camera captured a devastating California home explosion that hospitalized six people near Hayward after gas line damage by a construction crew.

A natural gas line leak triggered a dramatic explosion that destroyed a Bay Area home on Thursday, injuring six people and damaging several other properties. At least one person was inside the home before it was leveled in the blast.

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.