Yemen’s Houthi militia, aligned with Iran, has issued warnings to shipping companies that their vessels risk attack if they use Saudi Arabian ports, escalating tensions in the Red Sea amid ongoing regional conflicts. The move follows the Houthis’ announcement of a naval blockade on Saudi Arabia, raising concerns over the security of maritime traffic through a critical global shipping route.

The militia’s threat pertains to oil tankers and other ships loading or unloading cargo at Saudi ports, with several vessels reportedly altering their routes to avoid Houthi-controlled areas near the Bab el-Mandeb strait at the southern entrance to the Red Sea. Two tankers loaded with Saudi crude oil destined for China and India reversed course this week, diverting toward the Suez Canal as a result of the warning. The Houthis claim that six ships have changed course in response, reflecting heightened apprehensions about potential disruptions to Saudi oil exports, which remain a significant component of global energy supplies.

In response to the Houthi threats, U.S. President Donald Trump stated that the United States would act decisively if attacks on shipping materialize. Speaking at a Washington meeting with Lebanese President Joseph Aoun, Trump emphasized, "If something like that happens, we take care of things," referencing previous U.S. military actions against the Houthis. The U.S. military’s Central Command reported ongoing operations targeting Iranian-linked military sites, including missile and drone launch locations, as well as defense installations. Iranian state media confirmed explosions across several provinces.

Diplomatic efforts to revive a stalled interim deal between the U.S. and Iran continue amid renewed hostilities. Iranian Interior Minister Eskandar Momeni’s visit to Pakistan, a key mediator, signals ongoing regional diplomatic engagement despite escalating violence. The Trump administration, while open to negotiations, stressed that any talks must be substantive. The White House has reportedly debated whether to escalate military responses or seek a temporary ceasefire.

Meanwhile, the conflict has inflicted injuries on nearly 100 U.S. service members over recent weeks, most sustaining minor concussions. Pentagon officials have denied allegations of withholding information about troop injuries. Discussions in the U.S. Senate concerning an additional $87.6 billion Pentagon funding request, predominantly earmarked for the conflict, underscore the war’s financial and political implications.

On the ground, Iranian attacks extended beyond Yemen, targeting U.S.-allied nations in the region. Jordan’s military intercepted multiple drones and missiles launched by Iran, while Kuwait reported damage to its desalination and power plants due to ongoing strikes. Saudi Arabia’s strategic reliance on its Red Sea port of Yanbu has intensified since Iran restricted access through the Strait of Hormuz, heightening the importance of the Red Sea corridor.

The Houthis’ blockade declaration and threats to Saudi ports have revived fears of broader economic disruption, especially amid volatile crude oil prices which recently rose above $90 a barrel after an earlier decline linked to a tentative ceasefire. The militia’s actions reflect longstanding hostilities with Riyadh, intensified by wider Iran-U.S. tensions playing out in multiple theaters.

The situation remains fluid, with significant implications for regional stability, global energy markets, and international diplomatic relations.