Another officer in Tennessee was badly wounded hours later after being shot searching for suspect.
The Saudis are "determined to get to the bottom" of what happened, said the secretary of state.
The student, a local man acting alone, killed himself after the attack that killed 17 and injured 40, said an official.
In the past five years, 74 cities have voted to remove fluoride from their drinking water, despite thousands of studies showing it prevents cavities.
The country will pardon all those with convictions for possessing up to 30 grams of marijuana, the new legal threshold, an official told the Associated Press.