NEW YORK (AP) — Police say a security guard has died after a man walked into a federal building in Manhattan and opened fire. The guard, identified by his union as Idrisa Camara, died shortly after the shooting Friday evening. Police say the gunman walked through a side entrance of the building that houses an immigration court and other government offices. Chief James O'Neil says the gunman later shot himself in the head. He was found dead in the building. A law enforcement official identified the shooter as Kevin Downing, of Fort Lee, New Jersey.