The attacks also came as leaders of Muslim nations gathered in Islamabad for the Thursday start of an economic summit of the Developing 8 or D-8 . At least 31 people are killed in the blasts across Pakistan , police say . Police : The deadliest blast killed 23 people in Karachi . The attacks primarily target Shiites participating in religious observances . The Pakistani Taliban claimed responsibility for three bombings .
At least 31 people are killed in the blasts across Pakistan , police say . Police : The deadliest blast killed 23 people in Karachi . The attacks primarily target Shiites participating in religious observances . The Pakistani Taliban claimed responsibility for three bombings .