An explosive charge attached to a vehicle which was part of the convoy of Izzat al-Shabander, an independent lawmaker, detonated in the morning in Jadriyah district in central Baghdad, wounding three of his bodyguards and two bystanders, the source told Xinhua on condition of anonymity.
Shabander was not in the convoy when the attack occurred, the source said.
Shabander has lately joined the State of Law political bloc, headed by Iraqi Prime Minister Nuri al-Maliki, to run the country's parliamentary elections in March 2010.
"I can confirm that terrorists attacked my convoy. I wasn't there, but I knew that three of my bodyguards were wounded, one of them lost a leg," Shabander told Xinhua by telephone without elaborating.
In separate incident, a roadside bomb went off late on Sunday night near a police patrol, wounding three policemen in Suliekh district in northern Baghdad, the ministry source added.
Sporadic attacks continue in Baghdad as part of recent security deterioration which shaped a setback to the efforts of the Iraqi government to restore normalcy in the country ahead of the country's national polls slated for March 7.