The US military says three American soldiers have been killed in an explosion west of Baghdad, and an unexploded car bomb has been found near coalition headquarters in the Iraqi capital.
Streets in central Baghdad were closed as military explosives experts de-fused the car bomb, which was discovered near one of the gates to the so-called "green zone" that houses military and civilian coalition offices.
Hours earlier, a US military convoy was hit by what the military called a large explosion in the town of Khaldiya. There were reports of Iraqi casualties in addition to the three soldiers killed.
Khaldiya is in the so-called "Sunni Triangle," where attacks on coalition troops and Iraqis working with the United States are frequent. On Saturday, a car bomb killed three US soldiers and wounded six at a military checkpoint in Khaldiya.
Meanwhile, the US based television network CNN says two of its employees -a translator-producer and a driver - were killed in an ambush on the outskirts of Baghdad. The network says a cameraman was wounded in the attack.
Elsewhere in Iraq, the US military says its troops killed three Iraqis early Tuesday in a raid in the town of Beij,) north of Saddam Hussein's hometown of Tikrit.
The military says the three men were suspected members of a group known as "Mohammed's Army" that has been staging attacks on coalition forces.