The Standard hotel confirmed the termination to PEOPLE.
"The Standard has identified the individual responsible for breaching the security policies of the hotel and recording the confidential CCTV video released by TMZ," the hotel said in a statement.
"The Standard has already terminated the individual and will now be pursuing all available civil and criminal remedies. The Standard will next be turning over all available information to the criminal authorities."
It's still not clear what caused the May 5 altercation between Knowles and Jay Z, who is married to her sister Beyoncé. Sources have told PEOPLE that tension was building earlier in the night at a Met Gala afterparty.
On Wednesday, Beyoncé seemed to show solidarity with her sister by posting several loving photos of the two of them on Instagram.
Solange later followed suit, posting a cute vintage photo of her and her sister on Instagram for Throwback Thursday.