US sanctions on North Korea will not be lifted until nuclear risks are “substantially reduced,” Secretary of State Mike Pompeo said.

In an interview with NBC, Pompeo expressed the hope that, after his forthcoming talk in Vietnam with US President Donald Trump, North Korean leader Kim Jong Un will fulfill his promises to denuclearize his country.

Pompeo noted, however, that he does not wish to provide any details as to what each of the two sides is ready to offer during the talks to achieve progress.