Nobody messes with Naomi Campbell. The supermodel, who isn't always on her best model behavior, reportedly got into a physical catfight with Cara Delevingne during Paris Fashion Week.

The two models got into a fight Sunday over their mutual friend Rihanna during a party for Dasha Zhukova's Garage Magazine at Paris club Castel, Page Six reported Tuesday.

Campbell reportedly became upset and accused Delevingne of disrespecting Rihanna.

"Naomi accused Cara of 'disrespecting' Rihanna and started yelling, before Naomi pushed Cara, who pushed back," a source claimed. Another witness added, "Cara pulled Naomi's weave, but it didn't come off. Naomi was angry because she felt Cara had said something negative about Rihanna."

Another source said that Campbell unexpectedly started ranting at Delevingne, adding, "It was a noisy and packed party. Naomi was saying all these nonsensical things. She was ranting. There was a messy pushing match. Cara didn't understand because there's no problem between her and Rihanna. Cara didn't want to be involved and was telling Naomi, 'Get away from me!'"

Despite the altercation, sources claimed that Campbell continued to have fun and party. Campbell and Delevingne both took to Twitter to deny the incident.

"Don't know where this story has come from about @Caradelevingne and I fighting! It is completely untrue, ignore the rumours XN," Campbell tweeted. Delevingne retweeted the Campbell's statement and backed her denial, tweeting, "@NaomiCampbell people love to make a drama out of nothing."

Both Naomi and Cara's representatives refused to comment on the report.