Socialite Paris Hilton has been targeted by an anti-Semitic man who has sent her death threats.

The 33-year-old, who was raised a Roman Catholic, and her father Rick Hilton have both been targeted over social media where several abusive and anti-Semitic messages have been posted, reports tmz.com.

In one post, the man wrote to Rick: `One month and she's (Paris) dead, she's never coming home.`

Police say they know who's making the threats but they need the Facebook and Instagram verification before they can make an arrest.