Authorities say a Marine has shot and killed another Marine at Camp Lejeune in North Carolina.
The shooting happened around 5:30 p.m. Tuesday.
A Camp Lejune spokesman says a guard at the main gate fired an M4 rifle, killing another guard. Authorities say the two were inside a 15 feet by 15 feet guard shack at the time of the shooting. It's unknown if they were alone.
The identities of the Marines involved has not been released.
The spokesman says the base was never on lockdown, and stressed that the situation was very different from the Fort Hood shooting, which happened less than one week ago.
"We understand that people are at a state of heightened sensitivity, given what happened over at Fort Hood," Nat Fahy told CBS News. "It's important that we convey that this is not a Fort Hood-like incident. It was an isolated incident that's no longer active."
The deputy director of public affairs for the base, Capt. Joshua Smith, told Greenville, N.C. CBS affiliate WNCT that the situation was neither a "terrorist event nor an active shooter situation."
The situation is under investigation by the Naval Criminal Investigative Service.