The two stars and their entourages reportedly clashed over a parking space outside the Westlake Studio in West Hollywood, and police were called to the scene.
Ocean, who was left with a cut to his finger, allegedly declined to press charges, but officials at the Los Angeles County Sheriff's Department were still keen to question Brown over the incident on Monday (28Jan13).
And now it seems the Pink Matter hitmaker, who tweeted that he "got jumped by chris and a couple guys", has had second thoughts.
Police spokesman Steve Whitmore tells the Los Angeles Times newspaper, "Chris Brown is a named suspect in a battery report. The victim is desirous of prosecution."
Whitmore also told editors at Complex.com that Ocean was briefly hospitalised to treat minor injuries to his hand.
The incident could land Brown in big trouble as he is still on probation for assaulting his girlfriend Rihanna in Los Angeles the night before the Grammy Awards in February 2009.