U.S. President Donald Trump said the USS Boxer destroyed an Iranian drone in the Strait of Hormuz on Thursday after the aircraft threatened the ship by flying to within 1,000 yards of it.
He called on other countries to condemn Iran and protect their own ships.
Trump says the USS Boxer took defensive action after the drone closed to within 1,000 yards of the warship and ignored multiple calls to stand down.
The president says the drone threatened the safety of the American ship and its crew.
Iran recently shot down a U.S. drone that it said was flying over Iran. Trump called off a planned retaliatory airstrike at the last minute.