FILE - In this June 19, 2018 file photo, a boat that officials described as being a
In this June 19, 2018 file photo, a boat that officials described as being a "drone boat" once loaded with explosives by Shiite rebels in Yemen, is on display at a military installation in the United Arab Emirates.
  • The Houthis struck a commercial vessel with an uncrewed surface vessel on Wednesday.
  • It's the first time the rebels have scored a hit with a USV amid their ongoing Red Sea attacks.
  • Past attempts have been unsuccessful.

The Houthis used an uncrewed surface vessel to strike a commercial ship in the Red Sea on Wednesday, the US military revealed.