At least five people have been killed in a bomb attack near the house of a tribal leader in north-western Iraq, local officials say.
A suicide attacker drove his vehicle up to the house before detonating his explosives, reports say.
Tribal leader Kanaan al-Shimari was injured in the blast, which took place near the town of Sinjar, reports say.
In August, about 400 people were killed in bomb attacks targeting the minority Yazidi community around Sinjar.
Correspondents say that there are growing indications of a campaign of assassination by al-Qaeda in Iraq against officials and tribal leaders.
In mid-September, a key Sunni ally of the US and Iraqi governments was killed in a bomb attack.
Abdul Sattar Abu Risha led what was known as the Anbar Awakening, an alliance of Sunni Arab tribes that rose up against al-Qaeda in Iraq.