N. Korea to refrain from nuclear test

Labelling the rocket launch a 'threat to international peace and security,' Ban said North Korea should not take any 'further provocative actions or conduct any nuclear test.'

'(It) must heed the calls of the international community for maintaining peace in the region,' he told a press conference during a visit to New Delhi.

The UN secretary general's comments came amid fears that North Korea could soon conduct a third nuclear test, possibly within two weeks, after the failed rocket launch embarrassed the new regime of leader Kim Jong-Un.

South Korea's Chosun Ilbo newspaper has reported on preparations for a test in the northeastern town of Punggye-ri, where the North carried out two previous nuclear blasts in 2006 and 2009.

A South Korean government official told AFP on April 8 on condition of anonymity that satellite images showed a new underground tunnel built at the nuclear test site besides two others where the previous tests were conducted.

US Defense Secretary Leon Panetta has also warned Pyongyang, saying during a visit to Brazil on Tuesday that even though the rocket launch was a failure, it still amounted to a 'provocation.'