SINGAPORE'S Olam Group said that its investigation team did not identify any evidence that its Nigeria unit was involved in an alleged multi-billion dollar foreign exchange fraud. Last year, the Daily Nigerian and Prime Business Africa had reported that Nigeria's secret police was investigating the company's units, Olam Nigeria and Olam International, and their associate firms for a more than $50 billion foreign exchange fraud. The agri-business in September had "categorically denied" the media allegations and directed its audit committee to review the matter. "From the work performed by the Investigation team as approved by the Audit and Risk Committee…