Hazard to navigation in international waters, freedom of the seas. All that stuff. Time for a SINKEX. Simultaneous strike by sub launched torpedoes and air dropped JDAMs, after say, an air defense suppression strike of Tomahawks and anti-radiation missiles.
Interestingly, the U.S. and Iran are two of the only countries in the world that have not formally ratified the current international Open Seas treaty.
I suspect this is a big reason why the Trump administration has had a very hands-off approach with Iran over the various interactions the two countries have had in the Persian Gulf.