Houthi Attacks on Riyadh and Yanbu Add Pressure to Gulf Oil Routes

Saudi attacks and unresolved damage

Saudi Arabia said its air defenses intercepted and destroyed a Houthi ballistic missile directed at Riyadh early on September 19, 2026. The Saudi Press Agency said attempted attacks also targeted Baysh, Taif, Farasan and Yanbu. Riyadh has more than eight million residents.

Residents reported explosions in Riyadh, while journalists and verified footage showed smoke and a fire at an Aramco-branded fuel tank near King Khalid International Airport, according to Associated Press reporting. No casualties from the Riyadh incident had been reported as of September 20.

The cause of the fuel-tank fire remains unresolved. Saudi Arabia said it thwarted the attacks, while Houthi spokesperson Yahya Saree said the group used ballistic missiles, cruise missiles and drones against sites in Riyadh and Aramco facilities in Yanbu. The Houthis provided no independently verifiable evidence that facilities in Yanbu were hit.

Pipeline route faces separate constraint

Yanbu is the Red Sea terminus of Saudi Arabia's approximately 1,200-kilometer East-West Pipeline, a principal export route that bypasses the Strait of Hormuz. AP reported that earlier drone damage was expected to leave much of the pipeline unavailable for three to five weeks. The timing and extent of restored capacity have not been released.

The attacks therefore affect Saudi locations tied to population centers, aviation activity and oil-export infrastructure. Further damage at Yanbu or along the pipeline would reduce Saudi flexibility to move Gulf oil through the Red Sea while Hormuz traffic remains disrupted.

Hormuz flows remain sharply reduced

The U.S. Energy Information Administration estimates that oil flows through Hormuz fell from 21.6 million barrels per day in the fourth quarter of 2025 to 4.9 million barrels per day in the second quarter of 2026. LNG flows fell from 10.5 billion cubic feet per day to 0.8 billion over the same period, according to the agency's maritime chokepoints assessment.

Before the conflict, Hormuz carried about one-fifth of global petroleum-liquids consumption and more than one-fifth of global LNG trade. The decline in throughput represents an existing transport and supply disruption, with consequences for freight, insurance and fuel costs if shipowners and crews continue to judge the route unsafe.

The International Maritime Organization had verified 80 attacks on international shipping in and around Hormuz from February 28 through September 15, with at least 22 seafarers killed. Its September statement confirms the incident count and casualties, though it does not publicly assign responsibility for every attack.

The U.S. Maritime Administration said in a September 9 advisory that Iran continued to threaten and strike commercial vessels with missiles, armed drones and unmanned surface vessels, and assessed regional risk as high. Iran's political and material support for the Houthis is established, though public evidence has not demonstrated direct Iranian command of the September 19 Saudi attacks.

Protected transits continue

U.S. Central Command commander Adm. Brad Cooper said on September 19 that U.S.-coordinated protection had supported more than 2,000 commercial transits carrying one billion barrels of crude through Hormuz in recent months. The statement, reported by CBS News, did not provide a vessel list, accounting methodology or details on whether each transit received close naval escort.

Escorted vessels continue to pass through Hormuz, so the waterway has not undergone a complete physical stoppage. Future throughput remains dependent on security conditions, insurance availability, shipowner risk tolerance and U.S.-Iran negotiations.