Saudi authorities say the latest attack on the international airport in the capital, Riyadh, has killed 12 people and injured over 300. Their statement says the dead on Saturday included four Saudi citizens as well as two Bangladeshi nationals, a Palestinian, a U.S. citizen, an Egyptian, a Jordanian, a Syrian and a Sudanese. It said some of those injured were in critical condition. The attack — the latest of several in the past week on King Khalid International Airport — is expected to incre