Iraqi police say a series of bombings at Shi'ite mosques in Baghdad has killed at least 29 people and wounded more than 130 others.
At least six apparently coordinated blasts hit mosques around Baghdad just as worshippers were leaving Friday prayers.
The deadliest attack happened in Baghdad's northern Shaab district, where a car bomb killed at least 21 people outside a Shi'ite mosque.
No group has claimed responsibility, but Sunni militants and al-Qaida terrorists have targeted Shi'ite religious gatherings in the past. U.N. Secretary-General Ban Ki-moon condemned the attacks and said they appeared to be aimed at provoking sectarian strife.
In other news, seven U.S. military personnel were killed in Iraq during the month of July, marking the lowest U.S. death toll in the country since the war began six years ago.
U.S. combat forces withdrew from Iraqi cities at the end of June. Only U.S. trainers operate with Iraqi units in cities, while combat troops work in the countryside or wait on their bases should Iraqi units need help.
Violence in Iraq has dropped sharply during the past year, but attacks increased in June ahead of the U.S. withdrawal from Iraq's urban areas.