Iranian leaders have encouraged the Yemen-based Houthis to be ready to shut down shipping in the Red Sea if the United States strikes Tehran’s power infrastructure.

The Iranians have discussed the plan and informed their Houthi allies, Reuters reported on Thursday. New attacks like those the Iranians have carried out near the Strait of Hormuz in the Red Sea and the Bab el Mandeb Strait would exacerbate the already increasing energy crisis triggered by the U.S.-Iran war.