North Korean leader Kim Jong Un is reportedly in a coma, according to a report by South Korean diplomat Chang Song-min, a former aide to late South Korean President Kim Dae-jung.

The news spread by Chang indicates that North Korea is hiding Kim’s serious health condition and that his sister is among the most likely to succeed him.

“A complete succession structure has not been formed, so Kim Yo-jong is being brought to the fore as the vacuum cannot be maintained for a prolonged period,” Kim Dae-jung said, according to the Aug. 23 Mirror.

The South Korean spy agency also reported on Aug. 20 that Kim Jong Un had delegated some functions to his officials, including his younger sister Yo-jong, 33, in the supervision of the state, according to Yonhap News.

“Currently, Kim Yo Jong, the first vice department director of the Workers’ Party Central Committee, is steering overall state affairs based on the delegation,” Yonhap added.

A rumor was published in April that Kim Jon Un was incapacitated or possibly dead after a long absence from public events, however, he was later seen at the opening of a fertilizer factory in Suchon, Pyongan Province, near Pyongyang, the country’s capital.

Sen. Lindsey Graham (R-S.C.), was one of those who mentioned the possible death or incapacity of the North Korean leader in April.

The author Chris Makul, based in Australia, who wrote the book “My Favorite Dictators,” referred to the possible death of Kim Jong Un and the possibility that he could create a disaster in that country.

“You have to want the regime to fall eventually but you also have to think about the psychological effect it will have on people there,” Makul said, according to Mirror.

In addition to lacking a democratic system that would allow for a peaceful and organized transition of power, the nuclear weapons it possesses adds to the uncertainty of the situation in North Korea.

During his studies in Switzerland, Kim Jong Un became westernized, which led to his negotiations with U.S. President Donald Trump on the control of the atomic arsenal that poses a serious threat to the region.

As a result of these negotiations, Kim Jong-Un suspended testing of intercontinental missiles, medium-range missiles, and nuclear weapons while final agreements were reached between the two nations.