New York City: Explosion, building collapse, fire

Police move people away from the scene of an explosion and building collapse in the East Harlem neighborhood of New York on Wednesday.  (Jeremy Sailing / Associated Press)

Police respond to the scene of an explosion and building collapse in the East Harlem neighborhood of New York on Wednesday.  (Jeremy Sailing / Associated Press)

Police move people away from the scene of an explosion and building collapse in the East Harlem neighborhood of New York on Wednesday. The explosion leveled an apartment building, and sent flames and billowing black smoke above the skyline.  (Jeremy Sailing / Associated Press)

Police move people away from the scene of an explosion and building collapse in the East Harlem neighborhood of New York on Wednesday. The explosion leveled an apartment building, and sent flames and billowing black smoke above the skyline.  (Jeremy Sailing / Associated Press)

People flee after an explosion and building collapse in the East Harlem neighborhood of New York on Wednesday.  (Jeremy Sailing / Associated Press)

Emergency crews respond to the scene.  (Jeremy Sailing / Associated Press)

Firefighters work the scene of an explosion and building collapse in the East Harlem.  (Jeremy Sailing / Associated Press)

Heavy smoke pours from the debris as firefighters search through the rubble.  (Andrew Burton / Getty Images)

Firefighters battle a fire after a building collapse in the East Harlem neighborhood of New York.  (John Minchillo / Associated Press)

Firefighters search around a damaged van.  (John Minchillo / Associated Press)

Debris covers the street outside two multiple-dwelling buildings that collapsed.  (Justin Lane / EPA)

Firefighters douse the fire on 116th Street in Harlem after a building exploded in huge flames and billowing black smoke, leading to the collapse of at least one building and several injuries in New York.  (John Minchillo / AP)

Rescue workers remove an injured person on a stretcher.  (Mark Lennihan / Associated Press)

Firefighters survey the damage.  (Andrew Burton / Getty Images)

An injured man is assisted near the scene of an explosion and building collapse at Park Avenue and East 116th Street.  (Stan Honda / AFP/Getty Images)

There were reports of an explosion before the collapse of two multiple-dwelling buildings in New York.  (Andrew Burton / Getty Images)

A ladder truck pours water as the Fire Department of New York responds to the blaze at 1646 Park Ave.  ( Andrew Burton / Getty Images)

Bystanders two blocks away watch the scene.  (STAN HONDA / AFP/Getty Images)