NEW : Baloch militants are blamed for one attack ; Sunni militants , for a double - attack . Police say the death toll from the bomb blasts in Quetta has risen to 40 . It was swiftly followed by another explosion -- set off by a man sitting in a car with over 100 kilograms of explosives -- that caught many of those responding to the initial attack . A separate blast in the Swat Valley kills 21 people . A three - day mourning period begins in the restive province of Balochistan .
NEW : Baloch militants are blamed for one attack ; Sunni militants , for a double - attack . Police say the death toll from the bomb blasts in Quetta has risen to 40 . A separate blast in the Swat Valley kills 21 people . A three - day mourning period begins in the restive province of Balochistan .