10 Arab monarchies, especially Saudi Arabia. Minutes after meeting with King Abdullah, Mr. Gates told reporters that he had seen "evidence" of Iranian interference in Bahrain. That was followed by reports from U.S. officials that Iranian leaders were exploring ways to support Bahraini and Yemeni opposition parties, based on communications intercepted by U.S. spy agencies. Saudi officials say that despite the current friction in the U.S.-Saudi relationship, they won't break out of the traditional security arrangement with Washington, which is based on the understanding that the kingdom works to stabilize global oil prices while the White House protects the ruling family's dynasty. Washington has pulled back from blanket support for democracy efforts in the region. That has bruised America's credibility on democracy and reform, but it has helped to shore up the relationship with Riyadh. Rising Tensions in the Gulf A look at the Sunni-Shiite divide in the Middle East and some of the key flashpoints in the cold war between Saudi Arabia and [ran The deployment into Bahrain was also the beginning of what Saudi officials describe as their efforts to directly parry Iran. While Saudi troops guard critical oil and security facilities in their neighbor's land, the Bahraini government has launched a sweeping and often brutal crackdown on demonstrators. It forced out the editor of the country's only independent newspaper. More than 400 demonstrators have been arrested without charges, many in violent night raids on Shiite villages. Four have died in custody, according to human-rights groups. Three members of the national soccer team, all Shiites, have also been arrested. As many as 1,000 demonstrators who missed work during the protests have been fired from state companies. In Shiite villages such as Saar, where a 14-year-old boy was killed by police and a 56-year-old man disappeared overnight and showed up HOUSE_OVERSIGHT_023467