US officials are preparing to unleash a fresh crackdown on North Korea's offshore banking activities in an echo of its controversial squeeze on Macau's Banco Delta Asia five years ago.
The measures - part of tighter sanctions announced by US Secretary of State Hillary Rodham Clinton on Wednesday in the wake of North Korea's sinking of a South Korean warship in March - will see Washington seek fresh co-operation from Beijing, North Korea's chief ally, US officials said.
That co-operation could involve targeting specific Chinese banking transactions and enforcing broader measures against Pyongyang's elite.
'That Banco Delta Asia crackdown hurt Pyongyang ... it really made them feel pressure and we want to find ways of exerting that kind of heat again,' one official said.
Specific actions have yet to be detailed.
The delegation of Foreign Minister Yang Jiechi , now visiting Hanoi along with Clinton for annual regional security talks, has yet to comment on the news of fresh US sanctions. The measures are expected to send shivers down the spines of bankers across the region, with the US Treasury Department's unprecedented squeeze on Banco Delta Asia fresh in the minds of many.