Two more people were killed and five others injured in a roadside bomb at Jihad district in southwestern Baghdad, the source added.
In addition, separate bomb explosions wounded 12 people in Jihad and Grai'at districts in the capital, he said.
Also in Baghdad, six people were injured in mortar barrage on the neighborhoods of Jihad in southwestern Baghdad and Adhamiyah in northern the capital, the source said.
The election is regarded as a test for Iraq's national reconciliation and political process as it has been struggling to boost security in the past few years and preparing itself for a planned full withdrawal of U.S. troops at the end of 2011.
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