UPDATE: 6:45 p.m.: According to The Associated Press, a lone gunman identified as 24-year-old Muhammad Youssef Abdulazeez, of Hixton, Tennessee, opened fire on a military recruiting center and another nearby military facility killing four U.S. Marines. Youssef Abdulazeez, who was killed in a shootout with authorities, is believed to have been born in Kuwait, though it's not clear if he is a U.S. citizen.  U.S. Attorney Bill Killian said officials were treating the attacks as an act of “domestic terrorism.”

UPDATE 2:45 p.m.: At least two military facilities in Tennessee were attacked in shootings Thursday, including one at a Navy recruiting building, officials said. In a news conference, Chattanooga Mayor Andy Berke says four are dead in the shootings and the gunman is confirmed dead as well.

Original Story: An active shooter was reported at a military facility in Chattanooga, Tennessee— the city's mayor and U.S. Navy said Thursday. At a news conference, Chattanooga Mayor Andy Berke said that it is a horrific situation and there is "an officer down" at the military reserve center. 

The New York Post reports that police have set up a command post near the site. It was not immediately clear how many people may have been hurt, or whether the shooter had been apprehended.

There is also a community college that confirmed the shooting near the campus. Chattanooga State Community College urged students to stay inside and close doors as the campus is on lockdown. 

Law enforcement told Brian Lepley, a spokesman with the U.S. Army Recruiting Command out of Fort Knox, Kentucky's recruiters that the shooter was in a car, stopped in front of the recruiting facility, shot at the building and drove off.

The shooter is being pursued by officials.