Several mortar rounds exploded near the convention center where delegates to Iraq's new National Council met for the first time Wednesday inside the heavily guarded Green Zone, wounding one person, the U.S. military said. Several shells exploded near a checkpoint outside and an hour later, two rounds landed in the Green Zone itself, sending up a plume of gray smoke, said Lt. Col. Steven Boylan, a spokesman for the U.S.-led coalition's press information center. "There were between three to five impacts around the checkpoint there causing one injury, an Iraqi citizen, and he is being treated," Boylan said of the first attack. There was no word on whether the second attack caused any injuries.