The U.S. Justice Department and New York State’s Department of Financial Services (DFS) are increasing the scope of their investigation into the bank because a few transactions allegedly involved U.S. dollars and a former banker who is a U.S. citizen, the newspaper reported on Sunday. The regulatory investigation involving trades worth $6 billon would be one of the first by the U.S. authorities regarding a potential breach of Western sanctions against Russia after its 2014 annexation of Crimea, the business daily said.