Feb 3 (Reuters) - A new probe of Swiss bank Credit Suisse discovered 890 previously undisclosed accounts with potential Nazi links, a U.S. senator said on Tuesday, amid efforts to shine a light on what he said was the bank's hidden role in World War Two crimes. Holders of the wartime accounts included the German Foreign Office, the SS paramilitary organization and a German arms-manufacturing company, U.S. Republican Senator Chuck Grassley told reporters in a briefing. He gave no details on how much money might have been held in the accounts and their current status. The organizations were part of...