The International Maritime Organization stopped its rescue operation in the Strait of Hormuz after a ship reported a suspected attack. The mission had been trying to evacuate sailors stranded in one of the world's most critical shipping passages — a rare effort that involved Iran, Oman, the United States, and shipping companies working together.

The UN had backed the evacuation plan to rescue crews left behind in the strait. When a ship reported the suspected attack, organizers decided to stop the mission to avoid putting more ships and sailors at risk.

The halt comes as tensions over Iranian actions in the strait have grown. In April 2026, Western governments and Gulf states accused Iran of weaponizing the strait — attacking ships and threatening vessels that try to pass through without permission. They said Iran had also proposed charging tolls for transit, which they argued violates international maritime law. The IMO has documented these Iranian threats.

The strait is crucial to global shipping: it carries about a fifth of the world's oil trade and is the only sea route out of the Persian Gulf. Any serious disruption there affects energy markets worldwide. Western governments have framed Iranian actions not simply as a dispute between two countries, but as a challenge to the international legal system that governs shipping through major straits.

The suspension reveals a basic problem: running a rescue mission in a war zone is hard, especially when one of the countries controlling the area has reasons to block ships from leaving. The IMO's operation needed Iran's cooperation — Iran controls the northern shore of the strait. That dependence meant a single incident could shut everything down.

Western navies have been present in the Gulf for decades to prevent countries from interfering with shipping. But a military deterrent and a humanitarian rescue mission operate differently. The April accusations showed that Western governments see Iranian actions as violating international law, not just causing political friction. This puts pressure on the IMO and UN: either find a way to protect ships during evacuation, or admit the strait is too dangerous to manage through negotiation alone.

As of late June 2026, no date has been set to restart the evacuation. Sailors remain stuck in the strait.