A Pakistani police official says the death toll from a massive bombing that tore through a Shiite mosque on the outskirts of the capital, Islamabad, during Friday prayers has risen to 31. Islamabad Deputy Commissioner Irfan Memon also said that at least 169 people were wounded. Police say the attack happened during Friday prayers and that an investigation is underway. Some of the wounded were reported to be in critical condition in critical condition. No one immediately claimed responsibility for the explosion, but suspicion is likely to fall on militants such as the Pakistani Taliban or the Islamic State group, which has been blamed for previous attacks on Shiite worshippers, a minority in the country.