The U.S. Navy destroyer USS Gravely intercepted anti-ship ballistic missiles headed toward the commercial ship Maersk Detroit Wednesday. This is the first attack by the Houthis in six days.

The targeting of another U.S.-owned commercial ship Wednesday shows the militant group remains intent on continuing its attacks in the face of multiple rounds of U.S. military airstrikes.

The Houthis launched anti-ship ballistic missiles at the U.S.-owned, flagged and operated commercial ship Maersk Detroit as it was transiting the Gulf of Aden, according to a statement from the U.S. Central Command. The U.S. Navy destroyer USS Gravely shot down two missiles and a third fell into the water. There were no indications of damage or injuries in the attack.

The U.S. military has been conducting airstrikes against the Houthis to degrade their capabilities since Jan.11, after several weeks of attacks on commercial ships by the militant group.