The USS Carney shot down at least three Houthi drones headed in the ship’s direction in the southern Red Sea on Sunday and responded to a distress call from a civilian commercial vessel that was fired upon by a ballistic missile, a US defense official said.

The drones were part of four attacks against three separate commercial vessels launched by Iranian-backed Houthi rebels in Yemen, US Central Command said in a statement Sunday evening. It’s unclear whether the USS Carney was a target of the drones.