The FBI considers the gunman who killed five U.S. service members in Tennessee a 'homegrown violent extremist', for now, but they won't confirm any motive.

FOX News Radio's Jeff Monosso reports:

Federal investigators, in their last press briefing, say they know where Mohammad Abdulazeez got the guns that he used to kill the American servicemen in Chattanooga last week, but they won't go into details on reports Abdulazeez had mental health issues, or that investigators uncovered his writings of anti-U.S. sentiments and computer searches for martyrdom.

(Reinhold) "At this point it's too early in the investigation to determine whether or not his... whether or not he had been radicalized."

FBI Special Agent Edward Reinhold.

Though at least two sources confirm to FOX News the suspect's computers show recordings of a now-dead former terrorist and American cleric. The FBI also says hundreds of agents are working some 400 leads around the globe.

Jeff Monosso, FOX News Radio.

LISTEN to FOX News Radio's special coverage of the FBI press conference on the Chattanooga shooting: