The UCI has confirmed it discovered an engine on a competitor's bike at the Cyclo-cross World Championships and has referred the case to its disciplinary commission.
An investigation was launched by the governing body last month following claims an engine was fitted to a female competitor's bike for the under-23 race at the event.
The competitor in question has not been named and the UCI has already stated the rider did not finish on the podium.
A UCI statement read: "On Saturday 30 January 2016, a concealed engine was discovered in a bike following checks at the Women Under 23 race of the 2016 UCI Cyclo-cross World Championships.
"Pursuant to the UCI Regulations related to technological fraud, the Union Cycliste Internationale (UCI) has today referred the case to the Disciplinary Commission which will hear all relevant parties in the weeks to come.
"Working independently from the UCI, the Disciplinary Commission is the body in charge of imposing sanctions for breaches of the UCI Regulations.
"No other statement will be made until a decision has been rendered."