The USS Spruance fired on and disabled an Iranian cargo ship (Touska) attempting to breach the U.S. naval blockade in the Arabian Sea on April 19, after the vessel ignored multiple warnings during a six-hour standoff. Marines boarded and seized the ship, marking the first boarding operation under the blockade that took effect April 13 as part of Trump's pressure campaign against Tehran. Iran's state media said Tehran would respond to the seizure. The operation is well-documented across multiple outlets including NPR, Washington Post, ABC News, and official U.S. Central Command statements.