APTOPIX Florida Office Complex Shooting

Florida authorities say a gunman opened fire at Citibank's business complex in suburban Tampa and killed a woman before a security guard fatally shot him. Chief Deputy Frank Losat of the Hillsborough County Sheriff's Office told a news conference Wednesday that the shooter drove a car through a fence and plowed into an outdoor courtyard where Citibank employees were eating lunch. Losat said the gunman exited the car with a rifle and fatally shot one person before being shot by private security. Four other people were injured, but Losat said he didn't know if any were shot. Authorities have not given a motive for the shooting at the sprawling complex, where 3,200 people were working.