The State Department said Tuesday it was working on details of an upcoming second summit between U.S. President Donald Trump and North Korean leader Kim Jong Un.
State Department spokeswoman Heather Nauert said there are still no details regarding the time or place of the summit, however, discussions between working level groups would intensify in the run-up to the meeting.
Earlier this week, the North Korean leader invited inspectors to the Punggye-ri nuclear test site to confirm it has been "irreversibly dismantled", a move that was met with praise by Washington.
"President Trump looks forward to building on the trust that was first established at the Singapore summit," Nauert said at a news briefing.
The first summit between the leaders took place in Singapore on June 12, and Trump and Kim both signed a joint-statement reaffirming their commitment to the denuclearization of the Korean Peninsula.
On Sunday, Secretary of State Mike Pompeo met with Kim in Pyongyang, as part of a larger tour which included visits to South Korea, Japan and China.
Pompeo said he had productive conversations during his meeting.
"We continue to make progress on agreements made at Singapore Summit. Thanks for hosting me and my team @StateDept," Pompeo said in a tweet.
Trump also tweeted about Pompeo's visit.
"@SecPompeo had a good meeting with Chairman Kim today in Pyongyang. Progress made on Singapore Summit Agreements! I look forward to seeing Chairman Kim again, in the near future," he said.