An explosion has levelled two apartment buildings in East Harlem, New York City. Police say at least two people have been killed.

Law enforcement officials have ruled out a terrorist attack and told CNN that the building collapse was caused by a gas explosion.

A resident in a nearby building reported smelling gas shortly before the explosion. Con Edison spokesman Bob McGee says the utility dispatched two crews just after 9:15 am, but they arrived shortly after the explosion.

Firefighters work in the rubble of a collapsed building in Harlem, new York
An injured man is evacuated by emergency personnel
A gap can be seen where a building used to be
Debris litters the roof of a neighbouring building after the blast
railway tracks
A worker walks along the Metro-North tracks strewn with debris from the explosion
Smoke, dust and steam rise from the scene as firefighters respond to the building collapse at 1646 Park Ave
Firefighters try to extinguish a fire at the site of a building collapse in Harlem
Firefighters go through debris and rubble at the site of a building collapse and fire in Harlem
Firefighters investigate the cause of the explosion
Alicia Thomas (left), who lived in one of the two buildings destroyed in an explosion in the East Harlem section of New York City, is comforted by her friend Shivon Dollar
A firefighter is wreathed in smoke and dust on East 116th street
child blanket
A man carries a child wrapped in a blanket on East 116th street
firefighters tracks
Firefighters work at the site of the collapsed building in the Harlem neighbourhood of Manhattan
Police attend to a man on East 116th street near an apparent building collapse
Residents watch emergency personnel work at the site of the collapse in Harlem