"Criminals should not be able to profit from their illegal activities in any circumstances, and we have taken robust action in recent years to crack down on dirty money," a government spokesperson said in a statement.

Shares in HSBC and Standard Chartered fell on Monday to their lowest since at least 1998 after the media reports based on leaked suspicious activity reports filed by financial firms with the U.S. Dept of Treasury's Financial Crimes Enforcement Network (FinCen).

(Reporting by Huw Jones; Editing by Catherine Evans)