Paris Hilton's Brother Gets In Fight at Sister's Party

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Paris Hilton's weekend Malibu bash turned into an all-out brawl.

The Calabasas/Malibu Sheriff's Department tells ET that the 33-year-old socialite's brother got into an altercation with another party guest around 2 a.m. on Sunday morning, July 13. Both parties declined an investigation and prosecution, so no arrests were made and no report was generated.

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According to police, Paris was not involved in the incident.

Hilton's 24-year-old brother Barron Hilton II Instagrammed from Malibu on Saturday, July 12, posting a pic of him and a friend, writing: "Miss this guy."

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After rumors started circulating as to what actually happened at Paris' party, the Simple Life star tweeted on Sunday night: "Untrue Rumors online. This man barged into my home uninvited & put 2 of my friends in the hospital when he was told to leave. Was so scary."