Saudi Arabia temporarily closed its 1,200-kilometre East-West oil pipeline as a precaution after a drone attack in the Riyadh and Medina regions, while Iran-aligned Houthi forces tightened their position around Red Sea shipping routes. The pipeline, which allows Saudi crude to bypass the Strait of Hormuz, carried about 4 million to 5 million barrels per day in recent months, or roughly 4% to 5% of global oil supply. Riyadh and Baghdad said the drone originated in Iraq, prompting Iraq to dismiss a military commander responsible for operations in Maysan province and launch an operation to identify those responsible. Four Yemeni government sources said Houthi forces reached or seized the strategic island of Perim at the entrance to the Bab el-Mandeb Strait, while Yemeni government forces indicated they would seek to retake captured territory. Saudi Crown Prince Mohammed bin Salman called President Donald Trump at least twice on Thursday to request military assistance against the Houthis. Washington declined direct military action for now but offered intelligence sharing and targeting support. The disruption comes as tanker traffic through the Strait of Hormuz has slowed sharply amid the U.S.-Iran war, oil prices have risen above $100 a barrel, and Saudi crude supply has fallen to its lowest level in more than three decades, according to the International Energy Agency. Iran denied directing the Houthis, describing them as an ally rather than a proxy.