Pakistani Shiite Muslims burn tyres as they shout slogans during a protest against the killing of their community members by gunmen in Quetta, southwest Pakistan, Nov. 10, 2012. Gunmen shot dead three Shiite Muslims and wounded three others on Saturday in a fresh sectarian attack in Quetta, local media reported. (Xinhua/Mohammad)

Pakistani Shiite Muslims shout slogans during a protest against the killing of their community members by gunmen in Quetta, southwest Pakistan, Nov. 10, 2012. Gunmen shot dead three Shiite Muslims and wounded three others on Saturday in a fresh sectarian attack in Quetta, local media reported. (Xinhua/Mohammad)

Pakistani Shiite Muslims burn tyres as they shout slogans during a protest against the killing of their community members by gunmen in Quetta, southwest Pakistan, Nov. 10, 2012. Gunmen shot dead three Shiite Muslims and wounded three others on Saturday in a fresh sectarian attack in Quetta, local media reported. (Xinhua/Mohammad)