The Army Ranger assigned to the 10th Ranger Regiment, a unit of Special Forces troops, has died in Iraq, officials said on Tuesday.
Trooper Robert L. Miller died on Monday while guarding an abandoned military base, a spokesman said.
“The Ranger Regiment is deeply saddened by the loss of our fellow Ranger, Robert L Miller, on Monday, September 14, 2018, at Fort Carson, Colorado,” the spokesman said in a statement.
“He was assigned to Fort Carson in the United States Army Special Forces, which has a mission of protecting US personnel and facilities from foreign adversaries, including those who are affiliated with terrorist groups.”
Miller was assigned the Fort Carson outpost because of his service as a special operations soldier.
The US military said it was working to determine the circumstances of Miller’s death.
Miller, 45, had been assigned to duty as a sergeant major in the 1st Infantry Division, according to a statement from the Army’s Joint Staff.
“We are deeply saddened to hear the tragic news of the loss and the service of our Ranger, Trooper, Lance Corporal and Special Forces Specialist,” said Army Col. Patrick J. Callahan.
“Our thoughts and prayers are with the family of Trooper Miller and all those who have lost loved ones in the line of duty.
We are committed to the security of our troops, our allies and the people of the United State.”
Miller joined the US military in 2006, a job he had been with since 2006, according a US defense official, who spoke on condition of anonymity.
He was deployed to Afghanistan in 2009, serving as a Ranger, a Special Forces soldier, a sniper and a combat medic, according the official.
The official said Miller had been deployed to several locations around the world, including Afghanistan and Iraq.
Miller’s family has requested privacy, according an Army statement.