At least 31 people died and 169 were wounded in a suicide bomb attack at the Imam Bargah Qasr-e-Khadijatul Kubra mosque in Islamabad. The explosion happened during Friday prayers, when the mosque was full of worshippers. A security source said, "The attacker was stopped at the gate and detonated himself." Witness Muhammad Kazim, 52, described the blast as "an extremely powerful" explosion tearing through the building as prayers began. This is the deadliest attack in Islamabad since a 2008 suicide truck bomb at the Marriott hotel that killed 60. City officials warned the death toll might rise further.