Four
Two other soldiers were injured in the blast, which happened in an eastern area of the city.
The convoy was returning from search operations when the blast took place, the military said.
Earlier, at least 12 Iraqis were killed in bomb attacks in
Eight Iraqi policemen died when a bomber targeted a joint army and police checkpoint in the Karrada district of Baghdad.
Another 25 people thought to be civilians were injured in the attack.
Four more people were killed in a bomb attack outside a factory in Iskandariya, a centre of the anti-US insurgency to the south of
'All-time high'
The
"An improvised explosive device (IED) detonated near the unit's vehicles as they were returning from cordon and search operations," it said.
"The second IED detonated shortly after the initial blast, killing four soldiers and wounding two others."
More than 3,200 US military personnel have died in
The violence came a day after a
But he said that car bombings in
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A