He did not elaborate on the itinerary for what will be his fourth visit there as the top American diplomat.

Speaking hours later here at a private forum in front of reporters, Amb. Harry Harris was cautious.

"I am not going to speculate on the outcomes of the trip that was just announced to ensure that the secretary and his team have the opportunity to do the work they have to do without being subject to any speculation from the US ambassador to Korea," he said.

With regard to the new representative, Harris took note of his "impressive" record.

"I do not know him in person, but he has an impressive record," the ambassador said. "I am optimistic that he will do the good work as the secretary is asking to do."

Biegun served as vice president of international governmental affairs for Ford for more than a decade. He was earlier a senior staffer for former President George W. Bush's national security adviser Condoleezza Rice, and he also has foreign policy experience on Capitol Hill.

Speaking at a separate session of the conference hosted by the East-West Center, Deputy Assistant Secretary of State Walter Douglas would not comment either on Pompeo's plan to visit North Korea.

He said he would let the secretary and his spokesperson Heather Nauert talk about the matter. He handles public affairs and public diplomacy in the department's bureau of East Asian and Pacific affairs.

Meanwhile, Harris spent more time addressing trade issues at the forum themed "Globalism vs. Regionalism." It was held as part of a three-day international alumni conference of the Hawaii-based institute underway in Seoul.

On China's "One Belt, One Road" initiative, he stressed the importance of a "fair and sustainable" approach.

"It's worthwhile to take a hard look at how the one belt one road is managed," he said. (Yonhap)