Two suicide car bombers struck police patrols in a predominantly Shiite area Friday in Baghdad, killing at least 11 people and wounding nearly 20, police said. The blasts struck in quick succession at about 6 pm in the Zafaraniyah area of southeastern Baghdad, shattering the calm of the traditional Islamic day of rest. The violence started when the driver of a Sedan plowed into police cars parked near a bridge where a checkpoint was being established. That was followed within minutes by the explosion of a fuel truck near another nearby bridge, police said.