?Four U.S. Marines�were killed in shootings today when a gunman opened fire on two military facilities near Chattanooga, Tennessee, officials said. The gunman, whose identity has not been released, was killed at the scene. Authorities believe he acted alone and said there is no further risk to the community.�

The incident began this morning around 10:45 a.m. when the gunman opened fire at the Armed Forces Career Center off Lee Highway. The center has recruiting offices for the Army, Air Force, Navy, and Marine Corp. Four Marines�were killed at the center, and local law enforcement was dispatched to apprehend the shooter. The names of the victims�have not been released as their families are still being notified, the Marine Corp said in astatement on its Facebook page?.

Local authorities then pursued the gunman to a second location, a Naval Reserve Center near Amnicola Highway. A police officer was shot in the ankle during the pursuit and was treated at a local hospital. The gunman then died on the scene, although authorities would not confirm if he was killed by law enforcement or took his own life. Two other individuals were injured in the shootings and were treated for them, officials said in a press conference this afternoon.�

U.S. Attorney Bill Killian said the incident is being investigated as an act of domestic terrorism and that the FBI will be in charge of the investigation, working with federal, state, and local partners.�

�We will treat this like a terrorism investigation until we determine that it is not,� FBI Special Agent In Charge Ed�Reinhold explained in the press conference, adding that he? believes the gunman either lived in Chattanooga or was living in the area prior to the attacks.