PYONGYANG, North Korea, July 7, 2018 (News Wires) - Secretary of State Mike Pompeo wrapped up two days of talks with senior North Korean officials on Saturday without meeting Kim Jong Un but with commitments for new discussions on denuclearization and the repatriation of the remains of American soldiers killed during the Korean War. Before departing Pyongyang, Pompeo told reporters that his conversations with senior North Korean official Kim Yong Chol had been "productive," conducted "in good faith" and that "a great deal of progress" had been made in some areas. But he stressed that "there's still more work to be done" in other areas, much of which would be done by working groups that the two sides have set up to deal with specific issues. Pompeo said that a Pentagon team would be meeting with North Korean officials on or about July 12 at the border between North and South Korea to discuss the repatriation of remains and that working level talks would be held soon on the destruction of North Korea's missile engine testing facility. n the days following his historic June 12 summit with Kim Jong Un in Singapore, President Donald Trump had announced that the return of the remains and the destruction of the missile facility had been completed or were in progress. Pompeo, however, said that more talks were needed on both. "We now have a meeting set up for July 12 - it could move by one day or two - where there will be discussions between the folks responsible for the repatriation of remains. (It) will take place at the border and that process will begin to develop over the days that follow," he said as he boarded his plane for Tokyo. On the destruction of the missile engine plant, Pompeo said, "We talked about what the modalities would look like for the destruction of that facility as well, and some progress there as well, and then we have laid out a path for further negotiation at the working level so the two teams can get together and continue these discussions." Earlier, Pompeo and Kim Yong Chol both said they needed clarity on the parameters of an agreement to denuclearize the Korean Peninsula that Trump and Kim Jong Un agreed to in Singapore. The trip was Pompeo's third to Pyongyang since April and his first since the summit. Unlike his previous visits, which have been one-day affairs during which he has met with Kim Jong Un, Pompeo spent the night at a government guesthouse in Pyongyang and did not see the North Korean leader, although U.S. officials had suggested such a meeting was expected. State Department spokeswoman Heather Nauert said no meeting with Kim Jong Un had been planned. As they began their talks on Saturday, Kim Yong Chol alluded to the fact that Pompeo and his delegation had stayed overnight in Pyongyang. "We did have very serious discussions on very important matters yesterday," Kim said. "So, thinking about those discussions you might have not slept well last night."