Iraqi police say bomb attacks on two predominantly Shi'ite markets in Baghdad have killed at least 76 people and wounded about 165 others.
In the deadliest attack, police say at least three bombs exploded on Monday in quick succession in central Baghdad's Shorja Market, killing at least 71 people.
Police say a bomb attack on another Baghdad market nearby killed at least five people.
An official at Iraq's interior ministry says police have arrested three suspects, including two foreigners.
The bombings come despite a new security crackdown on the capital by Iraqi and US forces.
The bomb blasts struck Baghdad as residents marked the first anniversary, according to the Islamic calendar, of a Sunni militant attack on the Askariya Mosque in Samarra, a site holy to Shi'ites.
Last year's attack on the Askariya Mosque sparked Iraq's descent into sectarian bloodshed.
In another development, Germany's foreign minister ,Frank-Walter Steinmeier says two Germans have been missing in Iraq since last Tuesday and may have been kidnapped. He declined to give further details.