New reports claim that Solange Knowles attacked Jay Z in an elevator after the Met Gala because she is suspicious of his relationship with designer Rachel Roy.

Roy, pictured below, is the ex-wife of Jay Z’s old business partner Damon Dash and worked for Jay Z before creating her own fashion label. She and Jay Z have apparently remained good friends, and their relationship is rumored to bother Beyoncé, and therefore Solange.

Solange And Rachel Roy Argued At Met Gala

Sources say that Solange has confronted Roy about her relationship with Jay Z before, and that things heated up again at the Met Ball when Roy and Solange crossed paths at an after-party at the Standard Hotel.

“Rachel Roy came up to [Solange] in a confrontational way earlier in the night… They’ve had a long-standing feud,” a source told Hollywood Life.

According to reports, Roy enjoys flaunting her close friendship with Jay Z too much for Solange’s liking.

“Solange was yelling that anyone who gets close to Jay has to be warned and deal with her as a sister,” a source said.

The women fought verbally and things got a bit heated before Beyoncé reportedly stepped in and “intervened with a warning not to talk to her sister."

After that, the trio got in the elevator and Jay Z is rumored to have chided Solange for talking to Roy and mentioned going to a party without Beyoncé, which caused Solange to think he was meeting up with Roy behind his wife’s back. In a rage, Solange lunched at her brother in law, as seen in the leaked surveillance video.

Adding fuel to the theory that Roy was involved in the fight between Jay Z and Solange, Roy’s ex, Damon Dash, posted a photo to Instagram of his daughter with Solange, writing of Solange “I am actually impressed with her independent spirit… She seems like a fighter.”

In a statement, Beyoncé, Jay Z and Solange stated that the entire conflict simply got out of control, but that they are moving past it as a family.

“At the end of the day families have problems and we’re no different. We love each other and above all we are family. We’ve put this behind us and hope everyone else will do the same,” the statement reads.

More on Solange, Beyoncé and Jay Z:

> Why Did Solange Attack Jay Z? The Complete Rumor Roundup

> Solange Knowles Deletes Pictures Of Beyonce From Instagram; Beyonce Posts Throwback Snaps With Sister

> Solange Knowles Punches & Kicks Jay-Z In Elevator After Met Ball; Beyonce Watches On

> Beyonce, Jay Z Announce 'On The Run' Summer Tour Dates

Read more about: