The U.S. military in Iraq says one American soldier was killed in a roadside bomb blast south of Baghdad Thursday.
The blast occurred in the same general region where U.S. troops and insurgents fought a brief battle on Wednesday, killing one U.S. soldier and two terrorists.
Also on Wednesday, a top U.S. military official, Brigadier General Michael Barbero, told reporters at the Pentagon that there is clear evidence Iranian forces are in Iraq giving training, money, and equipment to Shi'ite insurgents, including the deadly Improvised Explosive Devices - IEDs.
But he said coalition troops have not directly encountered any Iranians.
The IEDs have killed more than 1,200 U.S. soldiers and thousands of civilians.
The U.S. general says neutralizing the Shi'ite extremists will go a long way towards removing Iranian influence in Iraq.
Some information for this report was provided by AP and Reuters.