Solange Knowles' Alleged Attack on Jay-Z Ignites Speculation

As theories emerge regarding the video posted by TMZ, who is Beyonce's sister Solange Knowles?
2:21 | 05/14/14

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Transcript for Solange Knowles' Alleged Attack on Jay-Z Ignites Speculation
There is news about two of the key players in the story that has social media and the gossip rags ablaze. That caught on camera elevator punching and kicking attack, launched by beyonce's sister Solange against jay-z with beyonce in the middle. What were the two combatants doing out in public together today? With theories swimmrling like mad, what provoked, Solange to attack her brother-in-law, jay-z in an elevator. Is the music first family trying to change the narrative. According to TMZ, jay-z and Solange were seen jewelry shopping in Manhattan. Sources say they left without buying anything. But showed no signs of tension. It is a very far cry from the duelling duo seen here in the video that launched a thousand theories. The music industry titans, dressed to the nines for a met gala after-party, until something happened that clearly sent Solange into a fury. What appears to happen, beyonce's sister takes off and starts beating on jay-z. Jay-z's security guard hold her. The elevator opens and they all go their own ways. Very bizarre. Reporter: Solange is not known for stepping into her sister's spotlight. An indy darling who cultivated her distinct career with hits like "Losing you." They came to a separate scene than the pop queen bee. Her colorful style may land her on vogue's best dressed list. She does it her own way, rocking natural hair, choosing sexy over safe. Now the two sisters who grew up close are facing an onslaught of rumors about the real story behind the fight. Beyonce and Solange are really close, up to this point we haven't seen any altercations they have defended each other with media. This will be very interesting between Solange and jay-z. Reporter: Sibling rivalry or something more. Some are Reading the tea leaves into beyonce's song "Gjealous."

This transcript has been automatically generated and may not be 100% accurate.

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