South Korea, Seoul: Yeserday, the President of South Korea Park Geun-Hye signalled a tough new approach to derailing North Korea’s nuclear weapons programme, promising an uncompromising and more assertive response to Pyongyang’s provocations. In a strongly-worded televised speech to the National Assembly, Ms Park warned that South Koreans had over the years become “numb” to the threat from their northern neighbour, and said it was time to take a more courageous stand.

North Korea carried out its fourth nuclear test last month and followed that up on Feb 7 with a long-range rocket launch that was widely condemned as a ballistic missile test banned under UN resolutions. Arguing that efforts to foster cooperation with the North had led nowhere, Ms Park said it was time to prioritise the stick over the carrot in bringing Pyongyang into line.

The president said, “It has become clear that we cannot break North Korea’s will to develop nuclear weapons through existing means and goodwill”. “It’s time to find a fundamental solution for bringing practical change in North Korea and to show courage in putting that into action,” she added.

Her comments are likely to trigger an angry response from the North, which is already smarting from her unprecedented decision last week to shut down the operations of South Korean firms at the jointly-run Kaesong industrial estate in North Korea. After her speech Yonhap news agency cited defence officials in Seoul as saying four US F-22 stealth fighter jets would fly a mission over South Korea on Wednesday in a show of force.

Citing the North’s nuclear test and rocket launch, Ms Park said it was clear it had no intention of discussing denuclearisation. “If time passes without any change, the Kim Jong-Un leadership — which is speeding without a brake -could deploy a nuclear-tipped missile and we will suffer,” she said.

Defending the closure of Kaesong, she said it was “just the beginning” and signalled further steps that she argued were needed to derail the North’s nuclear programme. “The government will take stronger and more effective measures to make North Korea bitterly realise that it cannot survive with nuclear development and that it will only speed up regime collapse,” she said.

A similar line is being pushed by the United States and Japan to try to secure a strong UN Security Council resolution that will include harsh new sanctions on North Korea. Choi Kang, vice president of the Asan Institute think-tank in Seoul said Ms Park’s speech flagged a clear and significant policy change.