Add Yahoo as a preferred source to see more of our stories on Google. Feb. 7 (UPI) -- Investigators arrested four suspects, including the alleged mastermind, in Friday's mosque bombing that killed 31 and injured 169 in Islamabad, Pakistan.

ISLAMABAD -- An affiliate of the Islamic State group claimed responsibility overnight for a deadly suicide bombing inside a Shiite mosque on the outskirts of Pakistan's capital that killed 31 people and wounded 169 others, as mourners gathered Saturday under tight security at the same mosque for funerals for the victims.

ISLAMABAD (AP) -- An affiliate of the Islamic State group claimed responsibility overnight for a deadly suicide bombing inside a Shiite mosque on the outskirts of Pakistan's capital that killed 31 people and wounded 169 others, as mourners gathered Saturday under tight security at the same mosque for funerals for the victims.