A US soldier who died in Syria on Thursday has been identified.

Army Specialist Etienne J. Murphy, a 22-year-old Army Ranger from Loganville, Georgia, was the soldier who died Friday in a vehicle rollover incident in northern Syria, the Pentagon said.

Murphy was an infantryman assigned to 1st Battalion, 75th Ranger Regiment, which is based out of Hunter Army Airfield, Georgia.

Murphy was posthumously awarded the Army Commendation Medal.

Army Specialist Etienne J. Murphy, a 22-year-old Army Ranger from Loganville, Georgia, who died Friday in a vehicle rollover incident in northern Syria

The serviceman was fatally wounded when a vehicle rolled over in Al-Hasakah, Syria.

It was not immediately clear whether the incident was related to a combat situation. The Department of Defense says an investigation is ongoing.

The US has hundreds of troops and advisers in Syria in various roles, assisting local allies in the fight against the Islamic State group.

Soldiers from the 75th Ranger Regiment, to which Murphy was assigned, and Marine artillery units have been establishing firebases to attack Islamic State targets in and around Raqqa, the headquarters of the terror group's headquarters, the Army Times has reported.

US military vehicles travel in the northeastern city of Qamishli, Syria on April 29, 2017. It is not known whether the vehicle rollover incident that killed Murphy involved combat operations

Two other American service members have died in Syria since US troops arrived there in 2016.

Navy Senior Chief Petty Officer Scott C. Dayton, 42, was killed by an improvised explosive device in northern Syria on November 24, 2016.

US Air Force Staff Sgt. Austin L. Bieren, 25, died from suspected natural causes while deployed to northern Syria on March 28.