RAW VIDEO: Beyonce’s Sister Attacks Jay-Z In An Elevator

Solange Knowles kicks, punches, claws Jay Z in elevator video at Met Gala after-party (New York Daily News)

A surveillance video has surfaced showing Beyonce’s younger sister attacking her brother-in-law, although it’s unclear what caused the altercation.

It's a showdown with the in-laws.

Jay Z and sister-in-law Solange Knowles had an altercation at a Met Gala after-party May 5 that was caught on tape, obtained by TMZ.com.

It all went down in an elevator where the 27-year-old sister of Beyonce can be seen clawing and kicking at her brother-in-law as the "Halo" singer looks on.