Death Threats Made Against Caroline Kennedy

INSIDE EDITION is learning more about death threats made against Caroline Kennedy, the U.S. Ambassador to Japan.

The U.S. embassy in Tokyo received several calls in February from a man speaking in English who threatened to kill the 57-year-old daughter of the late president John F. Kennedy and Jacqueline Kennedy.

These threats come on the heels of last month's shocking knife attack on American Ambassador Mark Lippert in South Korea. Lippert was slashed on the face and arm.

As for the threats against Caroline Kennedy, police are reportedly investigating whether the calls could be an attempt at blackmail.