Recent drone strikes on Saudi Arabia’s East-West pipeline in September 2026, attributed to Iran-backed Iraqi militias, temporarily halted flows of up to 5 million barrels per day—roughly 4-5% of global supply—pushing Brent crude above $100 per barrel amid the ongoing U.S.-Iran conflict and Strait of Hormuz disruptions. The line, a critical workaround rerouting Gulf crude to Red Sea terminals at Yanbu, sustained damage to pumping stations and required weeks of repairs before partial resumption by late September. Heightened Houthi attacks on Saudi energy infrastructure and airports through early October have sustained supply-risk premiums, with traders monitoring Aramco’s capacity expansion plans and potential escalations that could further constrain exports or elevate Treasury yields and volatility measures.