A New York City police officer and at least three others have been killed after a gunman entered a Midtown Manhattan office building and opened fire, according to officials. Police said the gunman, ...

Officials say a man with a rifle killed an off-duty New York City police officer and three other people before taking his own ...

NYPD officials are heading to Las Vegas to investigate the gunman who killed four people in a Midtown Manhattan skyscraper.