Europe's Baltic states are at risk from further Russian money laundering, a top European police official said after several big banks were hit by scandals centered on the region.

Pedro Felicio, who is responsible for fighting money laundering at European police agency Europol, told Reuters that "huge inflows of criminal money" are mainly coming into Europe from Russia and China.

Russian money is alleged to be at the heart of multibillion dollar laundering rackets that engulfed Danske Bank, Denmark's largest lender, and Sweden's Swedbank.