A $300 million lawsuit against the National Bank of Ukraine is the latest outgrowth of an alleged massive embezzlement and money laundering operation in the country that involved a former president and interim prime minister.

The lawsuit claims officials at the National Bank of Ukraine, the country’s central bank charged with ensuring financial and currency stability, were not only “complicit” in a scheme to deplete a private bank’s funds but also supported and “actively participated” in the enterprise.