SEOUL--It appears that North Korea is not ready for its upcoming second summit on denuclearization, as it remains unclear which officials will be assisting leader Kim Jong Un and the specifics of the talks.

By last autumn, North Korea changed the division in charge of nuclear issues from its foreign ministry to the State Affairs Commission under Kim Jong Un, according to sources knowledgeable about U.S.-North Korea relations.

As a result, it is not known which of North Korea's negotiators will be involved when the North Korean leader meets with U.S. President Donald Trump in talks on denuclearizing the Korean Peninsula set for Feb. 27 and 28 in Vietnam.

The sources cited information from North Korean diplomat Choe Kang Il, a deputy director-general for North American affairs at North Korea’s Foreign Ministry.

Choe Kang Il was quoted by them as telling attendees at a symposium in Vienna in October that “the State Affairs Commission and the Korea Asia-Pacific Peace Committee, an external organization of the ruling Workers’ Party’s united front, are in charge of nuclear issue, not the foreign ministry.”

According to other sources with knowledge of relations between the two nations, Kim Jong Un had only three years to fully assume authority from his ailing father, Kim Jong Il, before his death in 2011.

Kim Jong Un had relied on his younger sister Kim Yo Jong regarding matters such as relations between North Korea and the United States.

Kim Yo Jong has solicited reliable figures from the North Korea government and its ruling Workers’ Party to serve as her aides, making them State Affairs Commission members.

Those members include Kim Yong Chol, former military intelligence chief and one of Kim Jong Un’s closest aides; Kim Song Hye, a senior official in charge of reunification; and Choe Son Hui, the vice foreign minister.

In October 2018, when Secretary of State Mike Pompeo visited North Korea, the United States had hoped to negotiate with foreign minister Ri Yong Ho, not Kim Yong Chol. The U.S. side thus expected a role to be played by North Korea's Foreign Ministry, which was not the case.