Flight data recovered from the black boxes of the China Eastern Boeing 737-800 airliner crash on March 21 showed that the plane’s sudden vertical “death plunge” into a mountain was an intentional act carried out by someone in the cockpit, a new report revealed.

In an exclusive published Tuesday, The Wall Street Journal said people close to U.S. officials conducting a preliminary assessment of the accident determined from flight data that manual actions performed on the flight controls directed the plane into its sharp plunge into a mountain.

“The plane did what it was told to do by someone in the cockpit,” one of the sources told The Wall Street Journal. The preliminary assessment mirrors a Leeham News and Analysis trade publication report last month that said the flight data indicated the pilot deliberately inputted flight controls causing the crash.