An active-duty Army sergeant was taken into custody Wednesday on suspicion of opening fire at his workplace on the sprawling Fort Stewart military base in Georgia, wounding five of his fellow soldiers,

Gunfire erupted at Fort Stewart in Georgia on Wednesday morning, prompting the base commander to lock down facilities in the wake of this “active shooter” incident.

Fort Stewart is a hub of military activity in the U.S., spanning thousands of acres and housing nearly 10,000 people.