MANHATTAN - Rescuers in East Harlem are still hoping to find survivors in the rubble after Wednesday's deadly explosion.

They're using sound devices to listen for cries for help, and telescopic cameras to look into small spaces.

At least one person is still missing. Eight others were killed in the gas explosion.

Officials say about 40 to 50 percent of the debris has been removed.

Right now, the NTSB is trying to pinpoint the exact point of origin of the explosion.