Two dozen people, including a professional female boxer, were charged Friday in an undercover investigation of two New York City gyms suspected in the peddling of steroids and other drugs to aspiring boxers, body builders and other clients.

Cindy Serrano, 25, a featherweight nicknamed "Checkmate," was awaiting arraignment on charges of criminal sale of a controlled substance. The name of her attorney was not immediately available.

Also facing drug charges was Serrano's husband, a manager and boxing trainer at one of the gyms. Both gyms are in Queens.

The arrests followed an 18-month investigation dubbed "Operation Dumbbell," during which undercover detectives bought drugs inside both gyms, Police Commissioner Raymond Kelly said at a news conference.

Kelly said people at the two gyms made tens of thousands of dollars each week by selling steroids "and a cornucopia of other drugs, including cocaine, Ecstasy and prescription drugs Oxycontin and Vicodin."