Facebook Twitter

CAPTION ONLY: CAUSE OF MASSIVE EXPLOSION IN S.F. SOUGHT

SHARE CAPTION ONLY: CAUSE OF MASSIVE EXPLOSION IN S.F. SOUGHT

Margarita Delpeck examines wreckage of three-story apartment building she owns in San Francisco. A huge explosion demolished the building Thursday night, killing three men. Investigators searched Friday for the cause of the blast. Media speculation has focused on explosives, a natural-gas leak or an illegal drug lab nearby. The bodies of three men were pulled from the rubble. Four people were injured by flying glass.