The base "is in a lockdown status due to an active shooter incident in the 2nd Armored Brigade Combat Team area," a post on its official Facebook page said.

"The installation was locked down at 11:04 a.m. and law enforcement is on the scene at the time. Casualties have been reported and the situation is ongoing," the post said.

The 3rd Infantry Division -- which is based at Fort Stewart -- meanwhile said in a post on X that personnel should "stay inside" and "close and lock all windows and doors."