A soldier suspected in the fatal shooting of a civilian employee at an Army base in Fort Knox, Ky., was apprehended for questioning on Thursday, according to the U.S. Army Criminal Investigation Command, commonly referred to as CID.
The man apprehended by police in Portland, Tenn., and CID agents.
The man is assigned to Fort Knox’s 3rd Brigade Combat Team, 1st Infantry Division, CID said.
Officials described Wednesday's shooting as a "personal incident."
The base was briefly locked down and remained on heightened security Wednesday night.
The victim, who was an employee of U.S. Army Human Resources Command, was transported by ambulance to Ireland Army Community Hospital, where he was pronounced dead, according to a statement from the public affairs office of the base.
The incident was “not a random act of violence," said Chris Grey, spokesperson for the independent Army investigative agency.
The base was placed on full lockdown following the shooting, but it was lifted early Wednesday evening, the official said.
The military base, which sprawls over 170 miles in three counties about 30 miles south of Louisville, Ky., is separate from but adjacent to the famous federal gold depository.
The incident came less than two weeks after a U.S. Marine shot two colleagues to death at the Marine Corps base in Quantico, Virginia, before killing himself.
NBC News' Joe Myxter and Becky Bratu contributed to this report.