A suicide truck bomber struck near a Shi'ite mosque in the town of Haswa about 60 km (40 miles) south of Baghdad on Saturday (March 24), killing nine and wounding 43, a hospital source said. On Saturday (March 24), Suicide bombers struck across Iraq in a sharp upsurge in violence that killed dozens of people, many of them policemen. In the worst attack, a man driving a truck packed with explosives blew up outside a police station in Baghdad's volatile southern district of Dora, killing 20. The blast sent a large column of smoke into the air and rattled windows kilometres away in the centre of the city. Officers said the dead included 14 policemen and three detainees as well as three others working in the building. Another 26 were wounded. The blast caused major damage to the station, burying many victims in the rubble. A suicide car bomber struck a police station in the Qaim area of Anbar, near the Syrian border, on Saturday while two others struck police checkpoints at about the same time. In the northwestern town of Tal Afar a bomber wearing an explosives vest blew himself up in a market, killing 10 people, mayor Najim al Jibouri said. Two of the dead were policemen. Thousands of U.S. and Iraqi troops are sweeping through Baghdad in a major operation to stem communal bloodshed. They have succeeded in reducing the number of sectarian shootings, but curbing daily car bombings has proven more difficult.