A Kurdish member of Iraq's national parliament has been assassinated and another has been wounded.
A bodyguard was also killed when the men were ambushed near Baghdad as they were driving to the capital.
Meanwhile, the Iraqi parliament is handing over the text of the draft constitution to the United Nations deputy parliamentary speaker, Hussein Sharistani.
The United Nations has been tasked with printing five million copies of the draft constitution for distribution to voters ahead of a referendum on 15 October.
Sunni Arabs, who dominated Iraq under ousted leader Saddam Hussein, fear the charter will formalise the loss of influence they have endured since he fell, and boost the autonomy of southern Shi'ites in line with that already enjoyed by northern Kurds.
Many Sunnis have said they will reject it. Abu Musab al-Zarqawi, the leader of al Qaeda in Iraq, last week called for a war against Shi'ites following an Iraqi-led, US-backed miiltary assault on the northern town of Tal Afar.
Baghdad and Washington say Tal Afar was a stronghold of 'terrorists and foreign fighters' and have blamed Zarqawi for the bomb attacks and shootings across Baghdad last week.
