Many people were wounded by explosion rocked the Iraqi parliament building, official said.
The explosion took place in a cafeteria while several lawmakers were eating lunch, said Mohammed Abu Bakr, who heads the media department at the parliament.
"Several people were wounded, including members of parliament and some employees," Abu Bakr said.
Initial media reports said at least four people were wounded. Al-Arabiyah television said a member of parliament was killed.
A spokesman for the U.S. Embassy in Baghdad, which is also in the Green Zone, said no Americans were injured in the blast.
"We are aware of reports of an explosion in the Green Zone. We are investigating the nature and source of the explosion," spokesman Lou Fintor said. "No Embassy employees or U.S. citizens were affected."
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