Paris Hilton has vowed to make those responsible for the assault on her younger brother "pay".
The socialite lashed out after her sibling, Barron, was rushed to hospital in Miami, Florida on Friday night (Dec 6), hours after he was beaten up at a party.
Barron has claimed he was assaulted while partying at a mansion in the early hours of Friday.
The hotel heir, 24, posted a picture of his wounded face on Instagram on Saturday (07.12.13) and Paris commented: "They will both pay for what they did. No one f**ks with my family and gets away with it!!"
The blonde beauty, 32, also retweeted a message posted by her younger sister Nicky Hilton, 30, which reads: "Bad things happen when you hang out with bad people."