Pakistani security forces arrested four suspects, including the alleged mastermind, behind a suicide bombing at a Shiite mosque in Islamabad that killed 31 people and injured 169. The Islamic State group claimed responsibility, stating that the attacker targeted security guards before detonating his explosives. Defense Minister Khawaja Mohammad Asif linked the attack to militants operating from Afghanistan, prompting a sharp response from the Taliban. The incident drew widespread international condemnation, with Prime Minister Shehbaz Sharif vowing justice for the victims.