The threats came shortly after South Korean Prime Minister Chung Hong-won visited Yeonpyeong.

BBC: North Korea tells South to leave islands

The separate five-stage combat alert level, known as "Defcon, " has not changed and remains at stage 4, South Korean defense spokesman Won Tae-jae said at Thursday's briefing, according to Yonhap.

CNN: South Korean, U.S. forces raise surveillance alert level

Nor in all likelihood are several other South-East Asian currencies and perhaps the South Korean won.

ECONOMIST: South-East Asia��s currencies are not safe yet

South Korean government officials have said that the North's personal barbs against Ms. Park won't have any impact on how the South approaches inter-Korean relations.

WSJ: North Korea Severs Major Line to South

This means that, under South Korean rules, the banks would have to set aside a combined 10 trillion won in loan-loss provisions by the end of next year.

ECONOMIST: South Korean banks