One U.S. soldier, attached to Task Force Liberty, was killed Wednesday when a roadside bomb exploded at 12 p.m. near his vehicle close to Adwar, a town 10 miles south of Tikrit, the military said in a statement.
Two 42nd Infantry Division Soldiers were killed in an indirect fire attack on their base in Tikrit, 80 miles north of Baghdad at about 10 p.m. Tuesday, the military said.
A roadside bomb exploded near another U.S. vehicle at 10:30 p.m. Tuesday, fatally wounding a soldier attached to the 1st Corps Support Command north of Baghdad, the military said. The soldier was pronounced dead at a military medical facility.
The soldiers' names were being withheld pending next-of-kin notification.
As of Wednesday, at least 1,680 U.S. military members have died since the Iraq war began in March 2003, according to an Associated Press count.
In other recent developments:
Iraq's president openly praised Shiite and Kurdish militias in a statement Wednesday that could further antagonize Sunni Arabs at a time of growing fears of sectarian strife.
President Jalal Talabani's backing of the Shiite Badr Brigade militia came despite accusations by Sunni leaders that the militia has killed members of the minority. The Sunni leaders have demanded that it be disarmed and complained that it provides intelligence and support for some Shiite-dominated special security units.
The Badr Brigade was the military wing of the country's largest Shiite political party, the Supreme Council of the Islamic Republic in Iraq — or SCIRI. The party claims the Badr Brigade is no longer a militia but performs social and political functions.
"Badr is a patriotic group that works for Iraq's interest and it will not be dragged into sectarian or any other kind of conflict," said Abdul-Aziz al-Hakim, SCIRI's leader and the former commander of the Badr Brigade. "Badr is for all Iraqis," he added.