US Secretary of State Mike Pompeo welcomed Pyongyang's decision not to conduct nuclear tests or missile tests, but noted that North Korean leader Kim Jong Un still had "enormous" work to do.

According to him, North Korea is the only country that has obligations under the UN Security Council resolutions.

"It is the case that there is still an enormous amount of work to do. We haven't had any nuclear tests, we haven't had any missile tests, which we consider a great thing,” AFP reported quoting Pompeo.

"But the work of convincing Chairman Kim to make the strategic shift which we talked about, for a brighter future for the people of North Korea, continues," Pompeo added.