The U.S. military shot down multiple incoming drones and struck one ground control station inside Iran today that the military assessed as presenting a direct threat to U.S. forces and commercial shipping, according to a U.S. official.

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The strikes were near the city of Bandar Abbas in southern Iran, and the official described the strikes as defensive because the drones presented a threat to U.S. forces near the Strait of Hormuz and to commercial shipping that was transiting the area.

The official said that the attacks were limited and do not represent a resumption of major combat operations against Iran.

The drones, which the official said belonged to the country’s Islamic Revolutionary Guard Corps, did not hit any military or civilian target.

A U.S. official told NBC News on Monday that “very limited” and “very precise” attacks were carried out by the U.S. military after a series of missile, drone and small boat launches by the IRGC.