Citing anonymous sources, WCBS-TV reports that rapper Busta Rhymes was arrested for assault Wednesday night in connection with an alleged protein shake-throwing incident at a New York City gym.

According to the news station, the 43-year-old hip-hop artist got into a fight with another member of Iron Gym in Chelsea and “allegedly threw a container of Lean Body Protein at the victim.”

CBS New York’s sources say the victim was offered medical attention at the scene and refused.

[Image via Getty Images]