The hotel where it is claimed a fight broke out between Jay Z and his sister-in-law Solange Knowles has said it is "disappointed" a video has been leaked.

A statement from The Standard Hotel in New York confirmed it was investigating how footage from a lift was released.

"We are shocked and disappointed that there was a breach of our security system and confidentiality we count on providing our guests," it said.

Beyonce's management has declined to comment on the story so far.

Solange Knowles attended the Met Gala ball with designer Phillip Lim
The video was released by celebrity gossip site TMZ.

It says that the footage is of Jay Z, Beyonce and her sister Solange Knowles and claims there is a physical argument going on in a lift.

It's thought the incident happened after the three had attended the Met Gala Ball last week in New York.

The hotel added: "We are investigating with the utmost urgency the circumstances surrounding the situation and, as is our customary practice, will discipline the individuals involved to our fullest capacity Beyonce's sister attacking Jay Z World Doing to Rescue the Girls Kidnapping Have Been Prevented�� saved a terrified Chihuahua sensation unwanted animals discarded utterly surprising mitigation disability difficulty fleeing timing of calling the psychiatrist symptoms of dementia changes know about Donald Sterling surprise."