Obama: Gulf countries must work together, despite differences

"The prosperity and stability of the region depends on countries treating all their citizens fairly and that sectarianism is an enemy of peace and prosperity," Obama told reporters following the U.S.-Gulf Cooperation Council Summit. "If people are seeing themselves not as a citizen of a country but as a member of as a particular branch of Islam, that is a recipe for countries falling apart."

(Reporting by Roberta Rampton in Riyadh; Additional reporting by Susan Heavey and Will Dunham in Washington)