A U.S. commando has been killed in Afghanistan after being hit by a roadside bomb while on patrol with Afghan forces in a northeastern province bordering Pakistan.

U.S. special operations forces have been conducting counterterror operations with Afghan troops against ISIL fighters in Achin, Nangarhar Province. The U.S. military said the service member died Tuesday from wounds suffered when the patrol triggered a roadside bomb. The commando’s identity had not yet been released, pending notification of family.

The Pentagon said the service member was on foot patrol when the forces hit the roadside bomb. The U.S. has been conducting airstrikes near Achin.

It was the third death of an American soldier in hostile fire in Afghanistan this year, as the U.S. military mission there has been reduced to a smaller advisory role. In January, Staff Sgt. Matthew Q. McClintock was killed in the Marja district, in Helmand Province. In August, Staff Sgt. Matthew V. Thompson, a Green Beret, was killed when his patrol triggered a roadside bomb.