BAGHDAD: A bodyguard working for one of the main parties in Iraq's Sunni-backed Iraqiya bloc, which has clashed politically with Prime Minister Nuri al-Maliki, was killed on Tuesday, officials said.

Latif Ramadan Jassim was on duty near the headquarters of the Wifaq (Accord) party in Zeitun, west Baghdad, when he was stabbed to death on Tuesday morning, party spokeswoman and MP Intisar Allawi told AFP.

"The police are now conducting an investigation," she said.

An interior ministry official confirmed a Wifaq guard was killed in Baghdad on Tuesday.

It was not immediately clear why Jassim was attacked.

Wifaq is one of the main parties in the broader Iraqiya coalition, which won the most seats in March 2010 parliamentary elections but was outmanoeuvred for the premiership by Maliki's State of Law alliance.

Iraqiya began a boycott of parliament and then the cabinet in December, accusing Maliki of concentrating power in his hands, though the boycotts were lifted in January and February, respectively.

Also on Tuesday, retired army pilot Colonel Majid Abdul Mawjood was shot dead in the main northern city of Mosul, police First Lieutenant Mohammed Waggaa said.

And roadside bombs in restive Diyala province, north of Baghdad, left five civilians wounded, said police Major Ahmed al-Karkhi.

Violence nationwide is markedly lower than in 2006 and 2007 but attacks are still common, especially in Baghdad, Mosul and Diyala. A total of 126 Iraqis were killed in violence in April, according to official figures.