Feb. 16 (UPI) -- Fifty-seven people were killed and another 150 injured after a suicide bombing at a Muslim shrine in southern Pakistan on Thursday, government officials said.
Media reports citing police officials put the death toll higher, at 72 people.
The Islamic State claimed responsibility for the attack, which took place in the rural town of Sehwan in Sindh, at a shrine to the Sufi saint Lal Shahbaz Qalandar. The shrine is among the most holy for Sufi Muslims, a mystical branch of Islam opposed by the hard-line Islamic State.
"The past few days have been hard, and my heart is with the victims," Sharif said. "But we can't let these events divide us, or scare us. We must stand united in this struggle for the Pakistani identity, and universal humanity."
Two bombings in northwest Pakistan on Wednesday killed seven people and an explosion in Lahore on Monday left 13 dead.