Glen Carey Dana Khraiche Bloomberg

Militants escalated their campaign against Saudi Arabia's ruling Al Saud family with three suicide attacks in a single day, in the biggest challenge to the kingdom's internal security since it crushed an al-Qaida insurgency a decade ago.

Militants escalated their campaign against Saudi Arabia's ruling Al Saud family with three suicide attacks in a single day, in the biggest challenge to the kingdom's internal security since it crushed an al-Qaida insurgency a decade ago.