A suicide car bomber crashed his vehicle into a barrier outside a police building in central Iraq on Thursday morning, killing at least 13 people and wounding dozens more, officials said. According to AP, the blast is the second significant attack in Iraq since the death of Osama bin Laden Monday at the hands of a U.S. commando team in Pakistan. Iraqis have been on edge, waiting for al-Qaida's branch in Iraq to strike back as a way to demonstrate it is still dangerous. Iraqi security officials have said they are increasing security in the wake of bin Laden's killing. A police official said the bomber hit when the police were changing shifts in the city of Hillah, about 60 miles (95 kilometers) south of the capital Baghdad. Most of the dead and wounded were police, he said. The official put the number of dead at 13 and said 41 people were wounded. Another police official in Hillah confirmed the fatalities, but said 35 were wounded.