7 People Killed in New York City Building Explosion

Several people are still missing after a suspected gas explosion and building collapse in East Harlem.
3:00 | 03/13/14

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Transcript for 7 People Killed in New York City Building Explosion
A strong explosion in New York's east Harlem yesterday turned to five story apartment buildings in the rubble. At least seven people now are confirmed dead several are still missing and dozens injured ABC's rob Nelson has the latest. Almost a full day after the explosion to search for clues and the missing goes on. It's a tough IC battle against rain and plunging temperatures heavy equipment is working now moving beams and bricks that once -- two buildings. The theory is the buildings were ripped apart by -- natural gas had built up inside. And then exploded there's a more than century old cast iron pipeline that supplied the building. Several families in the building smelled gas the ninth of before and when it got worse in the morning Con -- was called at 9:13 AM but when repair crews reached the scene. The buildings were gone. We'll be looking at con -- Call -- deceived when the first calls started coming in to report such that it will that would definitely be part of our investigation. Colin Patterson live behind the piano store on the ground floor of one building. He was about to start work in the showroom in the store blew apart he says the piano's created a miraculous cocoon that saved him. There were moving on this side and. In everything from how -- -- there -- -- relief to Rome in a moderate. And again the news has turned even more grim overnight the discovery of three additional bodies. One about midnight another 245 -- third at about 3:15 this morning to adult males and one adult female. Rob Nelson ABC news New York.

This transcript has been automatically generated and may not be 100% accurate.

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