Iran's Islamic Revolutionary Guard Corps (IRGC) says its navy struck a US "Saildrone-type" unmanned surface vessel at the entrance to the Strait of Hormuz (the narrow waterway connecting the Persian Gulf to the Arabian Sea, through which roughly a fifth of global oil passes), describing the action as foiling an "aggressive mission." The UK Maritime Trade Operations Centre separately reported that projectiles struck two vessels off the coast of Oman in the same period, though no independent confirmation of casualties or damage has emerged. The incident comes amid broader IRGC claims of enforcing a self-declared restricted maritime zone in the strait, and ongoing — but as yet unfinalized — negotiations between Tehran and Muscat over a temporary transit corridor, raising fears of further confrontation in one of the world's most strategically critical shipping lanes.