(Adds dropped word "employee" in headline)
ZURICH, Nov 21 (Reuters) - Swiss federal prosecutors have opened a criminal probe into an employee of commodities group Trafigura as part of a wider investigation into suspected corruption at Brazilian group Petrobras, the Office of the Attorney General said on Monday.
It did not name the suspect. A Trafigura spokeswoman said: "Trafigura has not been approached by the Swiss authorities in relation to these allegations." She declined to comment further. (Reporting by Michael Shields and Julia Payne; editing by Andrew Roche)