An influential Iraqi Sunni group, the Association of Muslim Scholars, says gunmen have killed two Sunni clerics in Baghdad's Shi'ite districts.
A spokesman for the group said one cleric (Sheikh Hazem al-Zeidi) was killed late Sunday, as he was leaving a mosque in the Sadr City neighborhood.
The spokesman said the second victim (Sheik Mohammed Jadoa al-Janabi) was killed as he entered a mosque for noon prayers today (Monday) in another Shi'ite district.
In other developments, Iraqi witnesses say U.S. warplanes have hit targets in the Sunni stronghold of Fallujah, west of Baghdad.
The U.S. military has yet to comment on the strike, but hospitals say at least two people were killed and three others wounded in the attack.
Meanwhile, a deadline set by a group of militants threatening to kill two Americans and one British hostage was due to expire Monday. The three Westerners were abducted last week.
Information for this report is provided by AP and Reuters.