The U.S. military lost an autonomous submersible to forces from the Iranian Revolutionary Guard on September 27. State media in Tehran announced that the navy of the Guard took control of the device during a maritime operation, marking a direct confrontation in lapped waters.

The seized asset is an advanced REMUS 600-class unmanned underwater vehicle. The Revolutionary Guard's navy captured the American craft in the Strait of Hormuz, and the operation was confirmed via government news outlets.