>> live from chattanooga the latest. the federal bureau of investigation, according to the u.s. attorney for the eastern district of tennessee investigating this as an act of domestic terrorism elm. that's not to say what happened but they're investigating it as that. they got clarity as they said they'll work to determine who that's man was described only at a white male in a silver mustang, who shot first from inside the vehicle and at the second scene was on the run. he has been described to news no other way. we don't know if he is former military if he had any attachment think locations and authorities are very clear to say they're going to investigate this and when they do they'll be able to find out whether this is a crime or some act of domestic terrorism, in the meantime they'll investigate it as such. highlights being authorities believe there was one gunman, the gunman acted alone the gunman is now dead. four u.s. marines were also shot and killed. a police officer shot, according to the authorities there, in the