SEOUL, South Korea — North Korea threatened on Friday to take “physical countermeasures” against South Korea if it helps enforce sanctions against the besieged North, calling the United Nations-endorsed penalties a “declaration of war” and warning of a prolonged chill in the relations between the two Koreas.
North Korea’s confrontational posture was likely to significantly limit room for the South’s incoming conservative president, Park Geun-hye, to make overtures for reconciliation with the North; like the outgoing President Lee Myung-bak and President Obama in the United States, Mr. Park considers the dismantling of the North’s nuclear program the premise in all South Korea’s diplomacy toward the North. Since her December election, she has said she would not tolerate the North’s nuclear program and would deal sternly with North Korean provocations.
In a statement issued in the name of its Committee for the Peaceful Reunification of the Fatherland, which manages relations with South Korea, North Korea gave no hint of what those countermeasures might be. While its earlier pronouncements more often than not turned out to be bluster, North Korea does have a history of following up some with unexpected military attacks — most recently, its shelling of a border island in 2010 that left four South Koreans dead. It was also blamed for sinking a South Korean warship the same year, leaving 46 sailors dead.
Those two incidents brought the two Koreas closer to waging a full-scale war than ever in recent decades, dispelling Washington’s desire to engage North Korea in serious negotiation. While calling for a vigorous enforcement of U.N. sanctions, Glyn Davies, Washington’s special envoy on North Korea, also appealed to the North’s new leader, Kim Jong-un, not to miss the opportunities for a new beginning, stressing that Washington cannot improve ties with Pyongyang without progress in inter-Korean relations.
North Korea outburst against South Korea on Friday in the latest installment of a verbal barrage it has launched since the United Nations Security Council on Tuesday unanimously adopted a resolution condemning North Korea’s Dec. 12 rocket launching. The resolution called the rocket a violation of earlier U.N. resolutions banning it from testing ballistic missile technology, and called for tightening sanctions against the country.
“If the puppet group of traitors takes a direct part in the U.N. ‘sanctions,’ the D.P.R.K. will take strong physical countermeasures against it,” North Korea said, using the nickname it often uses for the South Korean government and the acronym of its official name, the Democratic People’s Republic of Korea. “‘Sanctions’ mean a war and a declaration of war against us.”
The U.N. resolution was the fifth to be slapped on the North for its rocket and nuclear programs since 1993. It calls for tightening existing sanctions, such as expanding a travel ban on North Korean officials and the freezing of assets of North Korean banks and other agencies accused of engaging in shipments and financing for the North’s missile and nuclear programs. It also broadened the means for U.N. member nations to intercept and confiscate cargo headed for the North.
Since the Security Council resolution, North Korea has said it would conduct a nuclear test and launch more long-range rockets and that there would be no more talks on the “denuclearization” of the Korean Peninsula, a main goal of Washington’s thus-far unsuccessful diplomacy on the Korean Peninsula for the last two decades.
With Friday’s threat against the South, North Korea, under the young Mr. Kim, appeared to be following a well-worn track established under his late father, Kim Jong-il, before his death in December 2011: a cycle of North Korean provocation such as a rocket launching, U.N. condemnation, North Korean warnings of “physical countermeasures,” which were sometimes followed by provocative actions, such a nuclear test.
While this familiar cycle repeated itself in recent years, North Korea also steadily boosted its nuclear and missile capabilities. The North Korean nuclear crisis began in the early 1990s with nothing but a tiny amount of fissile material North Korea was suspected of gleaning from its experimental research reactor. It has since accumulated enough plutonium for an estimated half dozen nuclear bombs, built a full-scale uranium-enrichment program, conducted two nuclear tests and made strides toward building intercontinental ballistic missiles that U.S. officials feared could one day be tipped with nuclear warheads.
On Thursday, North Korea said it felt no need to hide its intention of building rockets and nuclear weapons with the United States as a “target” because Washington had intensified its “hostile” policy of “stifling” the already impoverished country.
