London, June 14 -- The naval forces of Iran's Islamic Revolutionary Guard Corps (IRGC) have warned commercial shipping traffic near the Strait of Hormuz against navigating through the critical chokepoint, according to an audio recording of a public maritime radio channel.

The transmission, which was provided to Xinhua by a crew member aboard a commercial vessel near the strait, showed that the IRGC navy directed its message at all shipping assets operating across the Persian Gulf and the Gulf of Oman.

The radio dispatch stated that the Strait of Hormuz had been "completely closed" and cautioned that any vessel movement within the corridor would be dealt with "decisively."

The broadcast warned, "For the sake of your health and safety, a...