Latest: New York gunman identified as former hospital doctor

Latest: The gunman who opened fire at a New York City hospital, killing at least one person, was a doctor who used to work there, a police official said.

WHAT WE KNOW SO FAR:

• Up to seven people are reported to have been shot by a gunman in the Bronx Lebanon Hospital in the Bronx, in New York City;
• There are reports that three of the victims are doctors. Their condition is unknown as yet;
• The shooter is now dead, police confirmed;
• The AP has quoted a law enforcement official saying that the gunman killed at least one person before apparently killing himself;
• The shooter was a doctor who used to work there, a police official said;
• It is reported the shooter wore a white lab coat, and was armed with a rifle;