Jay Z and Beyonce on the red carpet at the 2014 Met Gala

May 5: After Mrs. Carter loses her ring, Jay-Z picks it up and "puts a ring on it" as they walk the red carpet for the "Charles James: Beyond Fashion" Costume Institute Gala at the Metropolitan Museum of Art in New York City.

Rabbani and Solimene Photography/Getty Images

The Standard Hotel in New York City says it is investigating the leak of a security video that appears to show Beyonce's sister, Solange, attacking Jay Z.

Asked about the video on Monday by The Associated Press, the hotel issued a statement saying it is "shocked and disappointed that there was a clear breach of our security system."

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TMZ posted the video and said it was shot last week inside a Standard Hotel elevator. It appears to show Solange attacking Jay Z in Beyonce's presence. A security guard intervenes. There is no audio.

The hotel says the leaked video violates the confidentiality it provides customers. It says it "will discipline and prosecute the individuals involved to our fullest capacity."

Representatives for Beyonce, Jay Z and Solange didn't immediately comment.

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