March 15 (UPI) — The Department of Defense has identified the six U.S. service members killed during a refueling mission as part of the Iran war as three members of an Air Force refueling wing and three from the Ohio Air National Guard.

The six crew members were aboard a Boeing KC-135 Stratotanker — a refueling aircraft — when it crashed Thursday in western Iraq, which was considered friendly airspace.

Among the dead were four airmen assigned to the 6th Refueling Wing at MacDill Air Force Base in Tampa, Fla.: Maj. John A. Klinner, 33, of Auburn, Ga.; Capt. Ariana G. Sabino, 31, of Covington, Wash.; and Tech Sgt. Ashley B. Pruitt, 34, of Bardstown, Ky. The three were part of the 99th Air Refueling Squadron based out of Sumpter Smith Joint National Guard Base in Birmingham, Ala.

Shortly after their identities were made public, Alabama Gov. Kay Ivey offered her condolences on X.

“Three of the service members who lost their lives in duty to our nation were stationed at the 117th in Birmingham,” she posted. “They were not only outstanding Airmen. They were our neighbors — our fellow Alabamians. May their service and that of their families never be forgot.

Three others were assigned to the 121st Refueling Wing at Rickenbacker Air National Guard Base in Columbus, Ohio: Capt. Seth R. Kobal, 38, of Mooresville, Ind.; Capt. Curtis J. Angst, 30, of Wilmington, Ohio; and Tech Sgt. Tyler H. Simmons, 28, of Columbus, Ohio.

Ohio Gov. Mike DeWine and his wife, Fran DeWine, were mourning the loss of the three airmen who operated out of Ohio and were trained to do work that was “critical in long-distance missions in defense of our nation.”

“Every mission they undertook involved risks that they were willing to take and the courage to put the lives of others above their own,” he wrote in a post on X.

“They served with honor.”

The Pentagon said the crash that led to the service members’ deaths was under investigation. A second Boeing Stratotanker involved in the incident declared an emergency before landing in Tel Aviv with no one on board injured.

Thirteen U.S. service members have died in connection to the Iran war, which began in late February.