Three roadside bombs exploded in central Baghdad today near a group of labourers seeking work, killing three people and wounding nine.
The attack came a day after bombings and shootings killed up to 61 people in Iraq, including at least 26 soldiers.
Workers have come under frequent attack in an insurgent campaign with a wide range of targets designed to topple the US-backed Iraqi government.
Thousands of members of Shia popular committees marched through Baghdad today in a show of force.
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Young men in civilian uniforms and headbands chanted as a speaker called on them to crush terrorists, and Saddam Hussein loyalists, who are leading a Sunni Arab insurgency against the Shia-led government. "Step on terrorism," he said.