The soldier was wounded by enemy fire and transported to a military hospital where he later died, a release said.

The name of the soldier was being withheld pending notification of next of kin.

On Sept. 6, Pfc. Jeremy Shank, 18, became the first 25th Infantry Division casualty for this latest deployment when he died in Balad of injuries received in Hawija, a Sunni stronghold. He was shot during a security foot patrol, the Pentagon said.

The Jackson, Mo., man was posthumously promoted to corporal.

Schofield Barracks officials are trying to determine if the aviation brigade soldier killed yesterday was based in Hawai'i, or was attached to the aviation brigade from another unit.

Approximately 2,400 Hawai'i soldiers with the aviation brigade and 90 to 100 helicopters are serving a year of duty in northern Iraq as part of Task Force Lightning.

Altogether, more than 7,000 25th Infantry Division soldiers are in Iraq.

On Tuesday, a formal "transfer of authority" was to be held at Contingency Operating Base Speicher near Tikrit to transfer U.S. command of northern Iraq and Multinational Division-North to Maj. Gen. Benjamin R. Mixon from Schofield Barracks.

Mixon is in charge of about 21,000 U.S. troops from Hawai'i and elsewhere as part of Task Force Lightning, a reference to the 25th Division's "Tropic Lightning" nickname here.