After weeks of intense speculation about the health of Kim Jong Un, state news agency KCNA said on Saturday the North Korean leader attended the completion of a fertilizer plant north of Pyongyang, the first report of his appearance since April 11.

KCNA said Kim cut a ribbon at the ceremony on Friday and those attending the event "burst into thunderous cheers of 'hurrah!' for the Supreme Leader who is commanding the all-people general march for accomplishing the great cause of prosperity."

Kim Jong-Un
North Korean leader Kim Jong Un attends the completion of a fertiliser plant, together with his younger sister Kim Yo Jong, in a region north of the capital, Pyongyang, in this image released by North Korea's Korean Central News Agency (KCNA) on May 2, 2020. KCNA/via.

A completion ceremony of the Sunchon Phosphatic Fertilizer Factory, which has been built as the production base of fertilizer, was splendidly held on May Day, the international holiday of the working people of the whole world, the report said. Kim was joined by his sister Kim Yo Jong as well as other senior officials, it added. This was the top leader's first public appearance in state media in more than 20 days.

Kim was seen in photographs smiling and talking to aides at the ribbon-cutting ceremony and also touring the plant. The authenticity of the photos, published on the website of the official Rodong Sinmun newspaper, could not be verified.

Asked about the KCNA report, US President Donald Trump said: "I'd rather not comment on it yet." "We'll have something to say about it at the appropriate time," he told reporters at the White House.

First appearance since April 11

Speculation about Kim's health has been rife after he missed the birth anniversary celebrations of state founder Kim Il Sung on April 15. The day is a major holiday in North Korea and Kim as a leader usually pays a visit to the mausoleum where his grandfather lies in state.

He last made a public appearance on April 11 attending a meeting of the ruling Workers' Party politburo. Following his absence from the anniversary, a South Korean news outlet specialising in the North reported that Kim was recovering after undergoing a cardiovascular procedure. A flurry of other unconfirmed reports about his condition and his whereabouts followed.

Kim Jong-un
Kim Jong-un (Pixabay) Kim Yo Jong (Twitter/Scott Dawson)

Officials in South Korea and the United States expressed scepticism about the reports, however. The former top U.S. diplomat for East Asia, Daniel Russel, said the pieces of the puzzle of Kim's disappearance would take time to assemble.

His reappearance showed that authoritative information about the well-being and whereabouts of a North Korean leader was very closely guarded, and rumours about him needed to be regarded with considerable scepticism, Russel said.

The rumours had, however, served to focus attention on North Korea's succession plan, which "in a monarchical and cult-like dictatorship is filled with risk, and the absence of a designated adult heir compounds that risk many times over," Russel said.

Earlier, a source familiar with U.S. intelligence analyses and reporting said that U.S. agencies believed that Kim Jong Un was not ill and remained very much in power.