He also banned motor bikes , often used to conceal bombs , for two days in some cities . NEW : The Pakistani Taliban say they are behind Sunday 's bombing . Shiite Muslims have been marking the sacred holiday of Ashura . Score: 6 The terrorist group has vowed to attack Shiite Ashura processions across Pakistan .
NEW : The Pakistani Taliban say they are behind Sunday 's bombing . Shiite Muslims have been marking the sacred holiday of Ashura . Score: 6 The terrorist group has vowed to attack Shiite Ashura processions across Pakistan .