Crews try to reach smoldering homes after blast

Crews try to reach smoldering homes after blast

JASON DEAREN,Associated Press Writer

JULIANA BARBASSA,Associated Press Writer

SAN BRUNO, Calif. (AP) — All that was left of some houses Friday were chimneys, rising from still smoldering ruins. Burned-out cars sat along ash-covered streets. And a rescue worker with a dog searched door to door for missing people.

The day after a gas line ruptured and a towering fireball roared through a suburban San Francisco neighborhood, killing four people, officials were trying to determine what led to a blast that raised questions about the safety of similar...