Iraqi officials say a senior Interior Ministry official has been shot and killed in Baghdad.
The assassination occurred Tuesday.
Reuters news agency says the group led by Jordanian terrorist leader Abu Musab al-Zarqawi claimed responsibility for the killing.
Guerrillas loyal to Zaraqawi's group also took responsibility for some of the attacks Monday in Iraq that left 25 people dead.
A suicide attack killed 15 people north of Baghdad while several attacks on Iraqi police and soldiers in Baquba killed 10 people.
Some information for this report provided by AFP and Reuters.