Two Missing After Bay Area Gas Explosion, Video

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.

Ryan Nishimoto — the deputy chief of operations for the Alameda County Fire Department — told NYT, 75 emergency personnel responded to the scene to extinguish the fire. It’s unclear what exactly caused the blaze.