FRANKFURT, Germany – An Islamic extremist who killed two U.S. airmen in an attack at Frankfurt airport last year was convicted of murder and sentenced to life in prison Friday.

Arid Uka, 22, was also convicted of attempted murder and serious bodily harm for wounding two other servicemen and for taking aim at a third before his 9 mm pistol jammed.

Uka killed Senior Airman Nicholas J. Alden, 25, from South Carolina, and Airman 1st Class Zachary R. Cuddeback, 21, from Virginia, in the March 2 attack on an Air Force security team headed for Afghanistan as its members boarded a bus at the airport.

Staff Sgt. Kristoffer Schneider survived devastating injuries from a head wound. Another airman, Edgar Veguilla, was hit in the jaw and arm.

Uka won’t immediately be eligible for parole after 15 years as is usual in Germany but must wait several more years for his behavior and possibility for rehabilitation to be reviewed.

Life sentences without a chance for parole are not possible under German law.