ABC7 / Brittany Maldonado

Two people are missing after an explosion in the San Francisco area ... and a doorbell camera captured the moment of the scary blast.

The incident took place in Hayward, California Thursday afternoon -- a city about 18 miles south of Oakland -- on what seems like an otherwise normal afternoon in the clip.

The camera's set up across the street from a house, which appears to have a construction crew working on it ... and the explosion happens suddenly ... with debris flying into the air and a massive fireball mushrooming into existence.

According to the New York Times ... the explosion appeared to lead to the complete and total destruction of one house ... as well as a massive fire which ripped through the neighborhood. ABC7 / Brittany Maldonado

Ryan Nis

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