Journalist Abd al-Adheem Muhammad reported that a car bomb detonated on the highway in Abu Ghraib, west of Baghdad on Sunday.
It exploded as a US military convoy, including ammunitions and supplies trucks, tanks and Humvee vehicles, was passing by.
"It seems that the car was parked at the roadside and detonated as the convoy was travelling by. The explosion was very huge and caused damages to the convoy," he said.
Mohammed added that US forces and tanks blocked the road, started searching and opened fire in the vicinity.
"US forces, backed by helicopters, were deployed searching for the attackers. We heard some houses have been damaged."
The correspondent reports that close by US military convoy came under machinegun attack damaged and set a supplies truck on fire.
Again US forces closed the road and started a search for the attackers.
In the city of Baquba, northeast Baghdad, correspondent Muhammad quoted Iraqi National Guards (INGs) and police as saying three people, including the driver of a bomb-laden car, were killed when INGs and Iraqi police opened fire at the car when the driver tried to approach the headquarters of the ING in Baquba.
"Police found five bombs in the car, prepared for explosion but they were foiled", he added.