FRANKFURT: The US Department of Justice (DoJ) is investigating trades worth billions of dollars that Deutsche Bank AG made on behalf of Russian clients, a person familiar with the situation told Reuters on Tuesday. US DoJ officials have demanded information from Germany’s biggest lender about the transactions as they involved the use of dollar, the person said. Deutsche Bank declined to comment. It had said in its second-quarter financial report that it was investigating equity trades by Deutsche Bank clients in London and Moscow that offset one another, adding the volume of these trades was ‘significant’.