Iran-aligned Houthi forces have captured a strategic island in the Bab al-Mandab strait, extending their grip over the narrow waterway that ranks among the world's most important shipping corridors. The volcanic island changed hands after forces loyal to Yemen's UN-backed, Aden-based government withdrew, according to reports from the region.
The seizure marks the latest in a series of rapid reverses for the internationally recognised government along Yemen's western coast. On Thursday, government-allied forces also lost control of the port city of Mocha, a significant setback that has reshaped the balance of power on the Red Sea littoral in a matter of days.
The Bab al-Mandab strait separates the Arabian Peninsula from the Horn of Africa and serves as the southern gateway to the Suez Canal. Roughly a tenth of global seaborne trade, including a substantial share of Europe's energy imports, passes through the chokepoint. Control of its shores and islands therefore carries outsized strategic weight, allowing whoever holds them to monitor, disrupt or threaten commercial traffic.
Saudi Arabia is particularly exposed to the shift. The kingdom relies on the strait for oil exports, and the Houthi advance places additional pressure on a route Riyadh has long treated as a security priority. The loss of Mocha and the island compounds concerns in the Saudi capital, where officials have watched the Houthis steadily consolidate their hold on Yemen's west coast over recent days.
The Houthis, who have controlled much of northern Yemen for years, are aligned with Iran and form part of the broader network of regional actors that Tehran supports. Their expansion along the Red Sea comes amid heightened tensions linked to the wider Iran-US confrontation, which has already injected volatility into energy markets and shipping lanes.
Reports from the region also indicate that a crucial Saudi oil pipeline has caught fire, further unsettling an already fragile security environment. The cause of the blaze has not been independently confirmed, and it remains unclear whether the incident is directly connected to the Houthi advance. Even so, the combination of the island's capture and the pipeline fire has intensified worries about the reliability of oil flows through the region.
The economic consequences could be far-reaching. Shipping through Bab al-Mandab has already faced disruption from earlier Houthi attacks on vessels, which forced many operators to reroute around the Cape of Good Hope at considerable cost. A permanent Houthi presence on the island would make such threats more sustainable and harder to counter, potentially raising insurance premiums and freight rates for cargo moving between Asia and Europe.
For the Aden-based government, the loss of both Mocha and the island represents a serious erosion of its position. The government has depended on a Saudi-led coalition for military support, and its inability to hold coastal territory may complicate future negotiations over Yemen's political future. The UN has repeatedly warned that territorial gains by armed groups undermine prospects for a negotiated settlement.
Regional powers are likely to view the development through the lens of the wider contest between Iran and its adversaries. Tehran's allies now sit astride a waterway that Western navies have patrolled for years, a fact that will weigh on military planning in Washington, Riyadh and European capitals alike.
What happens next depends largely on whether the Houthis attempt to fortify the island or use it as a base for further operations. Either way, the capture has already altered the strategic map of the Red Sea, and the consequences for global shipping and energy security are unlikely to fade quickly.