Eleven US military personnel have been killed in Iraq -- including six who died in a mortar attack west of the restive town of Fallujah.
US military officials say a barrage of mortars hit a US military base outside of Fallujah today (Sunday), wounding at least 30.
In separate action, a US soldier was killed in a roadside bomb blast near the northern town of Kirkuk. Earlier in the day, four US soldiers were killed in two attacks -- one in Baghdad and the other in southern city of Amara.
The violence came as a kidnapped American worker escaped his Iraq captors unharmed, three weeks after his abduction. US army officials say truck driver Thomas Hamill ran out of a building south of Tikrit and identified himself to US soldiers.
The 43-year old had not been heard from since his convoy was ambushed on April ninth.
Meanwhile, a senior US military commander, General Richard Myers, is denying reports a top general in Saddam Hussein's former army is in control of a 600-strong Iraqi force patrolling Fallujah.
The chairman of the Joint Chiefs of Staff, Richard Myers, also said he did not believe General Jasim Saleh would head peacekeeping in the city in the future.
Marine commanders say they are prepared to go back into the city if violence breaks out again.