Topeka ? Fort Riley officials were searching for answers Wednesday after two soldiers deployed in Iraq were charged with murdering three Iraqis. They were the second pair of soldiers from the post to face murder charges in as many weeks.

The U.S. Central Command said Sgt. Michael P. Williams and Spc. Brent W. May have been charged with premeditated murder. Williams also was charged with obstruction of justice and making a false statement.

The two soldiers serve in Iraq with the Army’s 1st Cavalry Division but are members of Company C in the 1st Battalion of the 41st Infantry Regiment, 3rd Brigade of the 1st Armored Division at Fort Riley. Approximately 750 soldiers from the unit have been assigned to the 1st Cavalry since June.

Military officials offered no further details about the case, which is being investigated by the Army’s Criminal Investigation Division.

The charges in Iraq followed by a week murder charges filed in Kansas against other soldiers from the 1st Battalion, 41st Infantry.

On Sept. 15, prosecutors charged Sgts. Eric J. Colvin, 23, of Pappilion, Neb., and Aaron R. Stanley, 22, of Bismarck, N.D., with the shooting death of Staff Sgt. Matthew H. Werner, 30, of Oxnard, Calif., at a home in rural Clay County, about 30 miles from Fort Riley.

A second soldier, Spc. Christopher D. Hymer, 23, of Nevada, Mo., was wounded in the incident and died Saturday in a Wichita hospital.