A suicide bomber struck a market in northern Iraq on Wednesday, killing at least eight people and wounding 25, police said. The explosion occurred just before noon as the market was crowded with shoppers in Tuz Khormato, 210 kilometers (130 miles) north of Baghdad. Northern Iraq has seen a recent rise in violence that many blame on insurgents fleeing a security crackdown in the capital. The city, which has a mixed population of Kurds and Sunni and Shi'ite Arabs, is 88 miles (55 Kilometers) south of oil-rich Kirkuk. In western Baghdad, a suicide car bomber slammed into an Iraqi army checkpoint in the Sunni neighborhood of Yarmouk , killing two civilians and wounding four others, police said.