A North Korean official told a White House National Security Council counterpart last week that working-level talks to revive denuclearization negotiations with North Korea would start very soon, a senior U.S. administration official told reporters on Tuesday.

The U.S. official had been in the region for unrelated talks, and traveled to the demilitarized zone (DMZ) on the border of North and South Korea to deliver some photographs commemorating the June 30 meeting at the DMZ between U.S. President Donald Trump and North Korean leader Kim Jong Un, the senior U.S. administration official said.