Danish authorities on Friday accused the Finland-based Nordea bank with failing to take action to prevent more than $3.5 billion in money laundering by clients in Russia. After years of investigations, the Danish Special Crime Unit (NSK) indicted the bank for extensive violations of the country’s Money Laundering Act from 2012 to 2015. “Nordea failed to adequately investigate the bank’s Russian customers’ transactions and ignored warnings about transactions to exchange offices in Copenhagen,” the NSK said. The indictment covers transactions totalling just over 26 billion kroner ($3.7 billion)….