Residents of a neighborhood devastated by a thunderous pipeline explosion likely will have to wait to move back into their homes.

After federal, state and local officials toured the damaged area Saturday, San Bruno Mayor Jim Ruane said some residents were being allowed back into a limited section to retrieve some belongings. But he says he "doubts" that any will be able to return permanently to their homes Saturday.

Calif. Sen. Barbara Boxer, National Transportation Safety Board Vice Chairman Christopher Hart, Lt. Gov. Abel Maldonado and other local officials toured the damage.

Boxer says the group saw remnants of melted cars in driveways as well as a portion of the ruptured pipeline.