5M bpd oil route threatened as Houthis seize Bab el-Mandeb island

For commodity investors and macro traders, the dominant question is how quickly a precautionary pipeline shutdown and a Houthi territorial gain translate into a sustained oil-price premium. The East-West pipeline was Saudi Arabia's key workaround after Hormuz disruptions, and more than 5 million barrels per day had been moving through its Red Sea terminus by early June. If the Bab el-Mandeb becomes a contested zone, Brent-linked benchmarks and energy equities may reprice risk faster than physical supply is actually lost.

Saudi Arabia's decision on Friday, Sept. 11, 2026, to shut down the East-West pipeline, its most important bypass of the Strait of Hormuz, came one day after a drone attack that the Saudi Foreign Ministry says originated in Iraq. The same day, Yemen's Iranian-backed Houthi rebels captured Mayun, also known as Perim, a small volcanic island that sits inside the Bab el-Mandeb Strait at the Red Sea's southern entrance. Together, the two developments open a new front in the Iran war and directly threaten one of the world's most important oil-exporting corridors.

“

That posture follows the sequence from July 2026, when Saudi Arabia and the United States bombed Iranian-backed militias in Iraq after earlier drone attacks on Saudi oil facilities that had been claimed by the Houthis.

The East-West pipeline, built in the 1980s, was designed for exactly this kind of crisis: it allows Saudi crude to reach a Red Sea port without passing through the Strait of Hormuz. According to the International Energy Agency, Saudi Arabia had by early June 2026 more than doubled oil exports from that Red Sea port to more than 5 million barrels per day. Shutting the line therefore eliminates a massive volume of export flexibility at a moment when Iran and its proxies are also pressuring the other major Gulf chokepoint, Hormuz. The pipeline had long been a critical workaround following past disruptions of Hormuz, and its precautionary closure has immediately concentrated risk back onto the Gulf route.

Riyadh's official language was deliberately restrained. The Saudi Ministry of Energy called the shutdown a precautionary measure, while the Foreign Ministry blamed several drones that came from Iraq and said the kingdom would not immediately respond in order to give the Iraqi government an opportunity to take necessary measures. Baghdad condemned the assault and ordered an investigation. That posture follows the sequence from July 2026, when Saudi Arabia and the United States bombed Iranian-backed militias in Iraq after earlier drone attacks on Saudi oil facilities that had been claimed by the Houthis. Regional officials told the Associated Press that the Houthis helped the Iraqi militias plan and execute those attacks. The pattern points to an increasingly coordinated Iranian proxy network capable of striking Saudi infrastructure from multiple directions.

The Houthi capture of Mayun is the group's biggest territorial gain in years. The island may be tiny, barren and volcanic, but it commands the Bab el-Mandeb, one of the world's key shipping lanes at the southern entrance to the Red Sea. Control of Perim gives Houthi forces positions to deploy anti-ship missiles, drones, mines and small boats against commercial and naval traffic. That is the pressure point Iran has sought to exploit in order to drive up world oil and gas prices and raise Washington's costs for supporting Israel and Gulf partners. A senior military official with Yemen's internationally recognized government and a Houthi official confirmed the capture to the Associated Press on condition of anonymity.