Ban said the nuclear test is a direct challenge to the

Security Council, adding that it is "absolutely essential" that the Council act and speak with one voice and engage with Pyonyang in a "unified manner." Ban said he has repeatedly called on the new leadership in Pyongyang to give up its pursuit of nuclear weapons, address international concerns through dialogue and to start building confidence with neighbouring countries, particularly South Korea. "Regrettably, my appeals have fallen on deaf ears," he said. The UN Chief added that the third nuclear test by Pyongyang is a serious challenge to global efforts to curb nuclear proliferation. Ban pointed out that North Korea is the only country that has carried out nuclear tests in the 21st century. "The authorities in Pyongyang should not be under any illusion that nuclear weapons will enhance their security. To the contrary, as Pyongyang pursues nuclear weapons, it will suffer only greater insecurity and isolation," he said.