LONDON, May 16 (Reuters) - European refiner Varo Energy, owned by the world's biggest independent oil trader Vitol, U.S. private equity firm Carlyle and Dutch firm Reggeborgh Invest, has been asked to collaborate with a probe into British biodiesel group Greenergy.
Britain's Serious Fraud Office said on Thursday it had opened a joint investigation with Dutch authorities into aspects of biodiesel trading at Greenergy and third parties.
"Varo has indeed been asked to collaborate in an ongoing investigation. As a matter of policy, Varo always cooperates fully with the relevant authorities in any jurisdiction in which it operates," a Varo spokeswoman said when asked about the probe. (Reporting by Julia Payne, writing by Shadia Nasralla; editing by Jason Neely)