11 killed in attacks north of Baghdad June 30, 2012 -- Updated 1434 GMT (2234 HKT) In another attack, seven people were killed and 45 others wounded when three explosions hit central Balad on Friday afternoon, police officials said. The first attack was a suicide bomber who detonated his explosive vest in a busy outdoor market in the town of Balad north of Baghdad. A few minutes later, two motorcycles rigged with explosives exploded near government offices, including a post office and a police station. Police said most of the victims were from the suicide attack in an outdoor market near a Shiite Shrine Balad is a predominately Shiite town in Salaheddin province. Police officials in Baghdad said they believe al-Qaeda in Iraq is behind Balad attacks as they have been trying to agitate the sectarian tension between Arab Muslims Sunni and Shiite. The officials told CNN on condition of anonymity because they are not authorized to speak to media.