Back to your corners—or, in this case, cars. Following their alleged fight on the night of the Metropolitan Museum of Art's Costume Institute Gala in New York City, Solange Knowles and brother-in-law Jay Z were escorted to separate vehicles outside the Standard Hotel's Boom Boom Room.

Solange, 27, left the Standard's Met Gala after-party on May 5 followed closely behind by older sister Beyonce and her husband, 44. Video of the trio shows the "Losing You" singer getting into a limo with Bey; Jay tries to enter, too, but is taken aside by a member of their security team, who escorts him to a black SUV parked behind the sedan.

The footage was reportedly filmed after the rapper's apparent melee with his wife's sister, which was caught on film by an elevator surveillance camera. (TMZ posted the video on May 12.) As seen in the leaked clip, Solange appeared to lunge at Jay Z while yelling and kicking in his direction.

At one point during the incident, Beyonce stepped in between her sister and her husband. There was also a man in the elevator—presumably security—who helped restrain Solange.

"Solange flipped out over something Jay had said, that she took the wrong way," a source told Us Weekly of the fight. "She took it too hard or too far. Not sure what it was, but she greatly overreacted."

Neither Jay Z's rep nor Solange's rep had a comment regarding the incident. A rep for the Standard, meanwhile, told Us Weekly, "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 to our fullest capacity."