Bombings Hit Saudi Fault Line as Islamic State Widens War

Waist-high concrete barriers are being installed around the Al-Anoud mosque in eastern Saudi Arabia, and young Shiite men in yellow vests search worshipers arriving for midday prayers.

The asphalt outside is still charred from the suicide bomb that killed four people there last week. “We’re trying to make people safe,” said Ahmed Hafeef, a 21-year-old member of the security committee that’s sprung up as locals seek to prevent a repeat attack. “After what happened, there are many volunteers.”