Chris Brown and Frank Ocean are at it again. After publicly feuding on Twitter in 2011, the superstar singers were reportedly involved in a physical altercation on Sunday night.

According to TMZ, Chris was at Westlake Studio in L.A. listening to one of his artists. As he headed out, Frank and his crew prevented him from leaving.

The “Thinkin Bout You” singer reportedly told Chris, “This is my studio, this is my parking spot.”

Breezy then went to shake Frank’s hand and that’s when one of Frank’s people attacked Chris. One of Chris’ friends hit Frank’s friend, according to sources connected to Brown.

Frank allegedly went to approach Chris before Chris pushed him away and they started brawling.

The police were called and are currently on the scene.

UPDATE: Frank tweeted about the situation. “got jumped by chris and a couple guys. lol. i only wish everest was there,” he wrote, referring to his dog. “cut my finger now I can’t play w two hands at the grammys.”

Per TMZ, Chris was not there when police arrived, but they did speak to Frank. No charges were pressed at this time, and no arrests have been made.

UPDATE 2: Chris Brown addressed the incident via Instagram. “Working on my album. Not working on negativity. Focus on feeding ya family. Bullshit will forever be in the shadows,” he posted along with a photo of him in the studio with Mario, songwriter Eric Bellinger, and his artists Sevyn and Sabrina Antoinette.