Pipeline Shutdown Disrupts 4-5% of Global Oil; 3 Border Crossings Reopen

For supply-chain and logistics planners, this incident is a two-front disruption: the East-West pipeline, which moves 4-5% of global oil supply and lets Saudi Arabia bypass the Strait of Hormuz, was shut as a precaution after drone strikes, while Iraq simultaneously closed three Iran border crossings. Passenger traffic resumed at Shalamsheh and al-Shib on Sept 13, but trade remains suspended as the crossings reopen in phases through Sept 17, leaving cross-border freight flows in limbo.

Iraqi security forces have located and seized a drone-launching platform used in the strike on Saudi Arabia's East-West oil pipeline, a development that begins to answer the question of how drones crossed from Iraqi territory to hit one of the world's most strategically sensitive crude arteries. Lieutenant General Saad Maan, head of Iraq's Security Media Cell, announced through the state-run Iraqi News Agency on Saturday, September 12, that an intelligence and security task force had tracked down and seized the launch equipment near the al-Tayeb/al-Shib border district in northeastern Maysan province, east of Amara and close to the Iranian frontier. Forensic and technical experts are now working to identify the operators, and Baghdad has approved an Iranian request to join the investigation and review its findings, an arrangement that underscores how tightly Iraq is sandwiched between Tehran-aligned forces and its Gulf neighbors.

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Saudi authorities traced the launch site to Maysan province in southeastern Iraq, a region near the Iranian border where Iran-aligned militias have long maintained a presence.

The target itself explains the stakes. The East-West pipeline carries roughly 4 to 5 percent of the world's oil supply and, critically, allows Saudi Arabia to bypass the Strait of Hormuz, the chokepoint through which much of the Gulf's crude normally flows. Several drones launched from Iraq struck the line in the Riyadh and Medina regions on Thursday, September 10, injuring several people and prompting a precautionary shutdown; some reports date the attack to September 11, a discrepancy that has not been publicly reconciled. Saudi authorities traced the launch site to Maysan province in southeastern Iraq, a region near the Iranian border where Iran-aligned militias have long maintained a presence.

Baghdad's response has been calibrated to preserve its 'preventive sovereignty' doctrine. Maan framed the operation in exactly those terms: Iraq adopts the principle of preventive sovereignty, meaning not only preventing attacks on its own territory, but also refusing to allow its land to be a launching pad against any other country or to become part of a proxy war. The government sacked the military commander in Maysan province, closed three border crossings with Iran, Shalamsheh in Basra, al-Shib in Maysan and al-Mandali in Diyala, and maintained direct communication with Riyadh to share intelligence. Saudi Arabia, for its part, said it had decided against retaliating 'for now' following a request from Baghdad, a restraint that has kept the incident from spiraling into the wider regional war.

The border crossing closures carry their own economic weight. Iraq announced on September 13 that the three routes would reopen in phases between September 13 and September 17, to reorganize operations and boost intelligence efforts aimed at stopping violations. Shalamsheh and al-Shib reopened to passengers on September 13 but not to trade, meaning the flow of goods between Iraq and Iran, a lifeline for Iraq's economy and a conduit for sanctioned Iranian commerce, remains partially interrupted as the investigation proceeds.