RIYADH, SAUDI ARABIA — Saudi Arabia shut its East-West oil pipeline as a precaution after drone attacks launched from Iraq struck the network, injuring people and damaging infrastructure along a route that has become critical to bypassing disrupted Gulf shipping.
Saudi Arabia's East-West oil pipeline remained at the centre of an emergency technical and security response after multiple attacks forced authorities to shut the system as a precaution, threatening one of the principal routes available for moving Gulf crude without using the Strait of Hormuz.
An important correction to the preliminary chronology is necessary: Saudi Arabia's Ministry of Energy says the pipeline was attacked on the morning of Thursday, September 10, not September 12. The ministry disclosed the shutdown on September 11, while Saudi authorities issued further statements about the origin of the drones and their response into September 12.
The Ministry of Energy said the attacks affected the pipeline in the Riyadh and Madinah regions and caused injuries. Emergency and specialist technical teams were deployed to secure the system and determine whether it was safe to operate. The ministry described the shutdown as precautionary and said further developments would be announced. It did not specify in that statement how many people were injured, how much physical damage occurred or when normal pumping would resume.
Saudi Arabia's Foreign Ministry subsequently said several drones involved in the attack had been launched from Iraqi territory. It said the strikes caused injuries and damage that authorities were working to address. Riyadh also said it had decided not to retaliate at that stage after Iraq's prime minister asked for an opportunity to take measures preventing further attacks from Iraqi territory.
That establishes the stated launch origin but not who ultimately ordered or controlled the operation. No publicly available Saudi statement reviewed for this article identified the organization or state responsible for directing the attack.
Saudi authorities date the pipeline attacks to September 10
The distinction between the date of the attack and the date of subsequent announcements matters in reconstructing the event.
The first official Saudi account reviewed for this article says the East-West system was subjected to several attacks on the morning of September 10. On September 11, the Energy Ministry publicly confirmed the precautionary shutdown and its safety assessment. Saudi Arabia then publicly identified Iraq as the territory from which the drones had been launched and explained that it was withholding an immediate response while Baghdad acted.
The chronology therefore differs from the initial reporting lead, which dated the attack to September 12. September 12 is instead the date carried by an English-language Saudi Press Agency publication reiterating the Foreign Ministry's position.
Iraq also began taking security measures. Reuters reported, citing the Iraqi prime minister's office, that investigations had determined the latest attacks originated in Iraq and that the commander responsible for operations in the southern province of Maysan had been dismissed. Reuters separately reported that Iraq ordered the Shalamcheh crossing with Iran closed as part of its security response. Those details remain dependent in this article on Reuters' reporting where the underlying Iraqi publications could not be independently retrieved.
A seven-million-barrel pipeline became critical as Hormuz traffic was constrained
The significance of the shutdown is unusually large because the East-West system has been performing a role for which Saudi Arabia built substantial redundancy into its oil-export network: moving crude from the kingdom's eastern production system to the Red Sea without requiring tankers to pass through the Strait of Hormuz.
The U.S. Energy Information Administration describes the pipeline as running from the Abqaiq processing area near the Persian Gulf to Yanbu on the Red Sea. Its normal crude capacity is 5 million barrels per day, while modifications completed in 2019 allow it to be expanded temporarily to 7 million barrels per day.
That expanded capability was not merely theoretical in 2026. Aramco said in its first-quarter results that it had sharply increased East-West Pipeline throughput to the system's maximum capacity of 7 million barrels per day as it supported exports through Saudi Arabia's west coast.
The EIA likewise said Saudi Arabia had rerouted crude to Yanbu following the closure of the Strait of Hormuz. Its more recent assessment describes 5 million barrels per day of the East-West system's expanded capacity as available for exports, with the remainder serving domestic requirements.
That makes the pipeline more than an alternative piece of infrastructure. During a severe Hormuz disruption, it is one of the limited physical mechanisms through which Gulf production can still reach international markets without transiting the strait.
Hormuz normally carries about one-fifth of global petroleum liquids consumption
The scale of the broader vulnerability is visible in U.S. government shipping data.
According to the EIA, oil movements through the Strait of Hormuz averaged 20.9 million barrels per day in the first half of 2025, equivalent to roughly 20% of worldwide petroleum-liquids consumption and about one-quarter of global maritime oil trade.
The same EIA analysis says alternative pipelines cannot fully replace those flows. Saudi and Emirati pipeline systems together offered about 4.7 million barrels per day of available bypass capacity under the conditions assessed by the agency.
The East-West route has already been carrying substantially more crude because of the current disruption. Reuters reported that recent flows were around 4 million to 5 million barrels per day, meaning the affected system had been transporting an amount equivalent to roughly one-fifth to one-quarter of the 20.9 million barrels per day that moved through Hormuz in the EIA's first-half 2025 benchmark. That comparison is a newsroom calculation using Reuters' reported pipeline throughput and EIA transit data; it is not an official estimate of lost supply.
A shutdown also does not automatically mean that the same volume of Saudi production is lost. Storage, alternative routing, export schedules, the duration of the stoppage and the extent of physical damage all influence how much crude ultimately fails to reach customers.
April attacks showed both the pipeline's vulnerability and its repair capacity
The September episode is not the first time this year that attacks have reduced the system's ability to move oil.
Saudi Arabia's Energy Ministry said attacks in April caused the East-West Pipeline to lose approximately 700,000 barrels per day of pumping capacity. The ministry announced on April 12 that technical and operational work had restored the pipeline to its full capacity of approximately 7 million barrels per day.
That earlier episode provides useful evidence about Saudi Arabia's ability to restore damaged infrastructure, but it cannot establish how quickly the September damage will be repaired. The latest official announcement reviewed for this article does not quantify the pumping capacity lost in the new attacks.
Aramco has also expanded the Red Sea end of the export system. The company said the commissioning of its Yanbu South Terminal in 2018 added 3 million barrels per day of west-coast export capacity. The terminal was designed to receive, store and load Arab Light and Arab Super Light crude.
Together, those facilities form a strategic corridor from Saudi Arabia's oil-producing east to its Red Sea coast — precisely the alternative that becomes most valuable when access from the Persian Gulf is restricted.
Trump points to Iran, but public evidence has not established responsibility
U.S. President Donald Trump said on Saturday that he believed Iran was probably responsible for the attack. Reuters reported that Trump made the comment while speaking to reporters in Dublin after talking with Saudi Crown Prince Mohammed bin Salman.
The statement should not be treated as an established attribution.
Saudi Arabia's public statement reviewed for this article says the drones were launched from Iraq. That is a claim about their point of origin. It does not publicly establish who manufactured them, who operated them, who ordered the attack or whether another government directed it.
Saudi Arabia has, for now, also separated that finding from military retaliation. Its Foreign Ministry said Riyadh was giving Iraq's government an opportunity to prevent further attacks while reserving Saudi Arabia's right to take measures necessary to protect its sovereignty, security, infrastructure and population.
The Gulf Cooperation Council backed Saudi Arabia's account that the drones came from Iraq and called on Baghdad to prevent its territory from being used for such attacks. That statement similarly did not establish who directed the operation.
Duration of the shutdown is now the critical supply question
Three questions determine the international significance of the attack: how much pumping capacity was actually lost, how long the interruption lasts, and whether Saudi Arabia can maintain scheduled exports using storage or other logistical options.
None had been fully answered in the Saudi official material reviewed for this article at publication time.
The Ministry of Energy said specialist teams were checking the pipeline's safety, while the Foreign Ministry said damage was being addressed. Neither statement provided a restoration timetable.
Oil markets were already under substantial pressure before the full consequences of the pipeline attack were known. Brent crude settled Friday at $104.61 a barrel and U.S. West Texas Intermediate at $100.05, according to Reuters market data, with prices heading for a weekly gain of more than 8% amid wider Middle East supply disruptions.
The pipeline attack therefore lands in a market where transport redundancy is already unusually valuable. EIA's August outlook said Saudi Arabia had rerouted crude away from Hormuz through the East-West Pipeline to Yanbu and that oil flows through Bab el-Mandeb had risen to an average 8.1 million barrels per day in the second quarter of 2026, from 5.4 million in the fourth quarter of 2025.
The next authoritative Saudi update — particularly one specifying restored pumping capacity or the amount of capacity still unavailable — will be more useful for assessing supply consequences than the fact of the temporary shutdown alone.
Until then, two conclusions can be made securely: a pipeline central to Saudi Arabia's strategy for bypassing the disrupted Strait of Hormuz was attacked and shut as a precaution, and Saudi Arabia says the drones came from Iraqi territory. Who ultimately directed the attack and how much crude supply the interruption will remove from the market remain unresolved.