A suicide bomber killed 13 people and wounded 13 on Tuesday when he set off explosives outside police headquarters in Kandahar, a government spokesman said. A Taliban spokesman, Qari Mohammad Yousuf, claimed responsibility on behalf of the group, saying that the bomber came from Kandahar. "The Taliban did this suicide attack. We will pursue these kind of attacks against government or coalition forces," he told Reuters and the AP in a phone call from an undisclosed location about an hour after the bombing. Yousaf has claimed previous attacks on behalf of the Taliban but his exact ties to the militia's leadership are unclear."Thirteen people were killed and 11 wounded. Ten of the dead and five of the wounded were police," an Interior Ministry official said. Some of the wounded were in a critical condition, officials said. The attacker drove a "motorbike straight into the guard post and then there was an enormous explosion," said Jan Mohammed, a senior police officer at the scene.