Video of Solange Attacking Jay Z in an Elevator

Video footage of what appears to be Solange attacking Jay Z in an elevator has just surfaced. Obtained by TMZ, in the video  Jay, Solange, and Beyoncé are all packed in the elevator along with what looks to be a security guard , and are all still dressed in their formal wear. Solange begins kicking and hitting Jay repeatedly, while he backs up towards one side of the elevator.
After leaving the Met Gala after party,  Jay went solo in one limo, and Beyoncé and Solange in the other.

The Standard Hotel in NYC's Meatpacking District has sent an official statement:
"We are shocked and disappointed that there was a clear breach of our security system and the confidentiality that we count on providing our guests. We are investigating with the utmost urgency the circumstances surrounding the situation and, as is our customary practice, will discipline and prosecute the individuals involved to our fullest capacity."

Update: Here is the full video of the elevator incident: