Cars, minibuses and roadside bombs exploded in Shiite Muslim enclaves across the city, killing at least 45 people in sectarian violence that defied the Baghdad security crackdown, while a radical anti-US cleric raised a new threat to Iraq's government.
Two officials close to Shiite cleric Muqtada al-Sadr said his followers would quit their six Cabinet posts Monday - a move that could leave Prime Minister Nouri al-Maliki's already weak administration without enough support to stay in power. (AP)