NASHVILLE, Tenn. (AP) -- An Army soldier from Tennessee who had been helping train Iraqi medics on how to treat combat wounds has died in Baghdad.

The Department of Defense said 38-year-old Staff Sgt. Timothy H. Walker of Franklin died Saturday after a roadside bomb exploded near Walker's vehicle.

Walker, a combat medic, was assigned to the 64th Brigade Support Battalion, 3rd Brigade Combat Team, 4th Infantry Division at Fort Carson, Colo.

In a recent press release from his brigade, Walker was profiled as the medical material coordinator for the Iraqi Security Forces logistics coordination team. He was teaching Iraqi police officers and Iraqi army soldiers how to track and receive medical supplies.

Walker was also training Iraqi medics in mass casualty missions and combat lifesaver courses, then showed them how to take the instruction back home to train more Iraqis.