"The Secretary-General is deeply concerned about the DPRK statement, which indicates the end of the moratorium on nuclear and missile tests," said Secretary General Stephen Dujarrick, spokesman for the Secretary-General.
It is noted that Guterres hopes that the tests will not be resumed in accordance with UN Security Council resolutions, since non-proliferation remains "a fundamental pillar of global nuclear security and must be maintained."
Earlier, North Korean leader Kim Jong-un announced that North Korea will soon introduce a new strategic weapon.
On December 29, US Presidential Adviser on National Security Robert O'Brien announced that the United States was ready to react in the event of new missile tests by the DPRK.