(Xinhua) -- A suicide bomber blew himself up Saturday in a popular market in the town of Tal Afar, some 420 km northwest of Baghdad, killing at least 10 and wounding three others, a local police source said. "At least 10 people were killed and three others injured when a suicide bomber wearing an explosives belt blew himself up inside a sweets shop in the Souq al-Saray market in central Tal Afar on Saturday afternoon," the source told Xinhua on condition of anonymity. Earlier Saturday, a suicide truck bomb hit a police station in southern Baghdad, killing at least 11 people and injuring 23 others. In another attack on Saturday, at least eight people were killed and more than 40 others wounded when a suicide car bomb hit a mosque in Iraq's southern city of Hilla. Violence persists in Baghdad despite the presence of tens of thousands of U.S. and Iraqi soldiers across the capital in a major security crackdown aimed at curbing insurgency and sectarian violence in the war-torn country.