A suicide attacker detonated a bomb among police on guard near a Shi'ite Muslim mosque in this northwestern Pakistani city, killing at least 15 people and wounding more than 30, police said. The attack came Saturday as Pakistan's minority Shi'ites started to commemorate their most important religious festival, Ashoura, often a target of sectarian violence. Paramilitary forces in armored vehicles were deployed to patrol Peshawar after the bombing. The blast went off in a bazaar area about 200 yards from a mosque that was the starting point for the Shi'ite procession. It caused a power outage that left the city center in darkness, complicating rescue efforts. Most of the victims were police and municipal officials who were clearing the route for the Shi'ite procession. The city's police chief, Malik Saab, was among the dead, said provincial police chief Sharif Virk.