A suicide bomber blew himself up in a bathhouse in a southern Afghan border town as men gathered to wash before Friday prayers, killing 17 people, a provincial official said. About an hour later, gunmen shot dead a police inspector in the nearby city of Kandahar, local police said. The attacks came the same day NATO announced that three of its service members were killed in roadside bombings, underscoring the continuing threat the Taliban pose, despite a stepped-up coalition offensive. The midday bombing in the bathhouse killed 16 civilians and a police inspector in Spin Boldak near the Pakistani border, about 70 miles (110 kilometers) east of the provincial capital of Kandahar, said the governor's spokesman, Zalmay Ayubi. An additional 23 people were wounded, and officials said many of them were transported to Pakistan for treatment. The Taliban claimed responsibility for the blast. A Taliban spokesman in the south, Qari Yousaf Ahmadi, said the attack targeted the second-in-command of the border patrol in the area. Officials have not identified the dead inspector as the border patrol deputy. President Hamid Karzai, whose government has been battling the Taliban while trying to bring them to the negotiating table, called the bombing a "brutal" and un-Islamic act. "Those behind this attack should know once again that the blood of the Muslim people has been spilled. It will not have any other result," Karzai said in a statement.