DAMMAM , Saudi Arabia, May 29 (UPI) -- An explosion outside a Shiite mosque in Dammam, Saudi Arabia, killed four people Friday, the second attack in a week in the Sunni-majority kingdom.
In a Twitter message, the Islamic State claimed responsibility for the attack, referring to the Shiite mosque as a "Polytheistic monument" and identifying the bomber as Abu Jned al Zazwari.