The Islamic State claimed responsibility for a suicide bombing that killed at least 75 people at a shrine in Pakistan on Thursday. Another 200 people were injured. The blast in the main hall of the shrine of the revered 13th-century Muslim Sufi philosopher Lal Shahbaz Qalandar was the deadliest in the country in two years. ISIS, a Sunni Muslim extremist group, said the attack targeted a gathering of Shiite Muslims, viewed by ISIS as apostates. “I saw bodies everywhere,” said witness Raja Somro. “I saw bodies of women and children.” Pakistani security forces killed dozens of suspected militants on Friday in a crackdown triggered by the attack.