Gunman kills four people including an NYPD officer in Manhattan [SOUND]

# Four people, including a New York Police Department officer, have been killed at a skyscraper in Midtown Manhattan. One person was wounded. According to authorities, a gunman wearing a bulletproof vest and armed with a rifle entered 345 Park Avenue. He opened fire, shooting an off-duty police officer who was working as a security detail at the building, and four others. NYPD Commissioner Jessica Tisch says the shooter was found dead in the building from a self-inflicted injury: