Three U.S. soldiers were killed and another wounded Saturday in Afghanistan when an Afghan soldier opened fire on them, NBC News reported.

According to NBC News, the attacker, who was identified as a member of the Afghan National Army’s Commando Forces, was killed in return fire.

The Department of Defense identified the soldiers who were killed, including North Carolina native Corporal Dillon C. Baldridge, 22, of Youngsville. Also killed were 25-year-old Sgt. Eric M. Houck, of Baltimore, Maryland, and Sg. William M. Bays, 29, of Barstow, California.

"Today, as we grieve, our thoughts and prayers are with the families of Cpl. Baldridge, Sgt. Houck and Sgt. Bays. We take this as a family loss,” said Maj. Gen. Andrew Poppas, Commanding General of the 101st Airborne Division (Air Assault) and Fort Campbell.

“In the days ahead, the 101st Soldiers and the Rakkasans will continue the fight against terrorism with unbridled determination. Our Soldiers are battle-hardened and committed to the defense of our nation and the freedoms for which we fight."

Officials said the soldiers were assigned to Headquarters and Headquarters Battery, 3rd Battalion, 320th Field Artillery Regiment, 101st Airborne Division (Air Assault) and Company D, 1st Battalion, 187th Infantry Regiment, 3rd Brigade Combat Team, 101st Airborne Division (Air Assault), Fort Campbell, KY.

Baldridge was posthumously promoted to Sgt. and earned the Bronze Star Medal, Purple Heart, Combat Infantry Badge and the Army Commendation Medal with one oak leaf cluster for his end of tour awards.