Italian prosecutors are reportedly investigating suspected fraud relating to the Formula 1 race at Monza.
Italy's La Repubblica reports that the authorities suspect tax evasion to the tune of €80m (£70m), relating to sponsorships by "dozens" of Italian and international companies.
The report adds that sponsorship invoices were falsified, and that 82 people are under the investigators' microscope.
SID news agency said: "The investigators do not rule out that this system for money laundering has been used in other countries where formula one races take place."
It is claimed that former F1 supremo Bernie Ecclestone was questioned over the matter, as were FIA president Jean Todt and his driver manager son, Nicolas Todt.
