Barclays Bank is reviewing accounts held by Russian offshore customers in a pre-emptive strike against possible money laundering.
The bank is taking the action in the wake of the scandal which alleges that billions of dollars have been launder through the Bank of New York and other foreign banks.
Barclays says it will review hundreds of accounts held in the UK, Channel Islands and the Isle of Man.
It has said it will close any accounts where it is unable to receive satisfactory assurances regarding there ownership and use.
The bank says the accounts of Russian customers resident in the UK are unaffected.