Celebrity watchers were shocked to see a video reportedly showing Jay Z being attacked by his sister-in-law Solange Knowles.
The pair, who had attended a Met Ball afterparty in New York City, were leaving the Standard Hotel with Beyoncé when an argument broke out.
A CCTV video, released by TMZ, shows blurry clips of the altercation - which took place in a lift.
Solange Knowles at the Met Ball
In the short clip, Jay Z is seen fending off Solange, 27. While the resolution is not entirely clear, it looks like Solange is held back by a bodyguard while her sister Beyoncé stands by. The Single Ladies singer intervenes but mainly to untangle her gown from the row.
Jay Z and Beyoncé at the Met Ball
It is unclear what triggered the heated exchange and as the website reported, the bodyguard stops the elevator at the 12th floor, presumably to keep the argument private.
When the trio emerged from the lift and left the building, photographers snapped Solange and Beyoncé getting into a car together while Jay Z stepped into a different vehicle.
Earlier at the star-studded Met gala, the family had shown no signs of a disagreement. Beyoncé posted a photo of her and her husband cuddling up to each other at their table.