Houthi Naval Threat Forces Saudi Oil Tankers to Reroute in Red Sea

Two Saudi oil tankers en route to China and India turned back in the Red Sea on Tuesday following the Houthi rebels' declaration of a maritime blockade against Saudi Arabia. The Houthis, backed by Iran and controlling northern and western Yemen including parts of the Red Sea coast, threatened to attack vessels docking at Saudi ports. This marked the first confirmed impact of the Houthi threat on shipping routes in the area, although the Bab al-Mandab Strait remains open and no full naval blockade is in place.

The tankers, named Shin Long Yang and Rhodos, had loaded oil at the Yanbu port on Saudi Arabia's west coast. Instead of continuing south through Bab al-Mandab toward the Indian Ocean, they rerouted north toward the Suez Canal. British maritime risk firm Vanguard described these route changes as the first verified since the Houthi announcement and warned of potential escalating disruptions to Saudi oil exports and regional shipping. The Financial Times reported at least four Saudi-related oil tankers altered their courses, with the Houthis claiming six ships retreated within 24 hours, though this was unconfirmed.

Despite the Houthis' claim of a "maritime siege," analysis shows that Bab al-Mandab is not physically closed, and vessels unrelated to Saudi Arabia continue to transit the strait. The Houthis do not control both sides of the strait but their proximity and past attacks using missiles, drones, and explosive boats raise the risk level for Saudi-linked tankers. This threat comes amid Saudi Arabia's increased use of the Yanbu-to-Red Sea pipeline to bypass disruptions in the Strait of Hormuz, creating a critical southern export route vulnerable to Houthi attacks.

Saudi Arabia condemned the Houthi threats and affirmed its commitment to protecting its maritime interests under international law. U.S. President Donald Trump stated the U.S. would intervene if the Houthis closed Bab al-Mandab, though he noted this had not yet occurred. Currently, the Houthi threat has created a partial de facto blockade driven by fear of attack, rising insurance costs, and shipping companies avoiding the route. If more vessels continue rerouting, the distinction between a threat and an effective blockade will narrow, potentially increasing regional tensions and impacting global oil supply chains.