The new season of Real Housewives of Potomac is going to be FIRE. 

MTO News learned that an explosive fight popped off during the filming of the new season of Real Housewives of Potomac, and that police may have ARRESTED one of the housewives.

Details of the altercation are coming to us second hand, as Bravo is trying its best to keep details from spilling out. But we spoke with multiple people connected to the show who tell us that a "serious fight" broke out during filming between Housewives Monique Samuels and Candiace Dillard.

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We've also confirmed that as a result of the altercation, police were called - and some action was taken. And social media reports say that one of the Potomac Housewives may have been arrested!!

According to multiple sources, the fight broke out while the ladies were all at a vineyard, drinking wine. The two ladies - who have been feuding for years - got into an argument, and then things got physical.

Here's what one source at the network told MTO News, "One of the Housewives got beat up, hair ripped off. It was bad, we had to call the police."

Wow . . . 

Other than the Michael Darby drama, another focal point of the season was the fall-out between once close friends, Monique Samuels and Candiace Dillard.

During the Real Housewives of Potomac Season 4 Reunion Part 3, the women became emotional and hugged each other, expressing their desire to move forward and repair their relationship.

Viewers have not known if the two friends made up until Part 3 of the reunion. When Andy Cohen asked the women what their roses and thorns for the season were, Dillard responding saying her thorn was the fall out with Samuels.

The mother-of-three agreed, and almost immediately teared up, saying she’s ready to move forward in their relationship. They both admitted their fall out was due to misunderstanding and met each other in the middle where they hugged and cried.

Apparently, something else happened...