DUBAI—ISIS terrorist group, the Sunni Muslim dominated terrorist group, claimed responsibility on Tuesday for an assault on a Shi'ite Muslim mosque in Oman that left at least nine people dead, including three attackers, a rare security breach in the oil-producing state.
Four Pakistanis, an Indian, and a police officer were among those killed in the gun attack, according to Pakistani, Indian, and Omani officials. The Oman police said 28 people of various nationalities were wounded, including security personnel.
