ANKARA — A Houthi advance along Yemen’s Red Sea coast and the reported capture of islands near the Bab el-Mandeb have exposed Saudi Arabia’s wartime partners and raised the stakes for commercial shipping through one of the world’s most important maritime passages.

Reuters reported on Wednesday that Houthi forces had taken ground overlooking the strait and that four Yemeni government sources said the Iran-aligned group had reached Perim Island. The report described the advance as a major setback for Saudi Arabia, while noting that Saudi officials did not respond to requests for comment.

The Bab el-Mandeb connects the Red Sea to the Gulf of Aden and the wider Indian Ocean. Its importance is geographic and economic: ships using the route link Europe, the Middle East and Asia, while the passage sits close to the sea lanes carrying energy and container traffic.

The Saudi response is also being shaped by uncertainty over outside support. Reuters said Crown Prince Mohammed bin Salman travelled to Cairo to seek help after Washington declined to intervene directly. Two regional sources told the agency Riyadh wanted Egypt to play a role in Red Sea operations; Egypt had not immediately confirmed whether it would agree.

The reports do not establish that the waterway is closed, or that every battlefield claim has been independently verified. They do establish a developing security problem: a stronger Houthi position near a maritime chokepoint, a Saudi search for partners, and a fresh reason for shipowners to reassess routing, insurance and timing.

*Reporting note: this article is based on the source record listed above and is current as of 16 September 2026. Figures, operational claims and casualty counts may change as authorities update their accounts.*