He was greeted by senior officials of the Department of Munitions Industry of the Central Committee of the Workers' Party of Korea (WPK) and scientists of the Nuclear Weapons Institute before being briefed on the details of nuclear weaponization.
The institute recently succeeded in making a more developed nuke, true to the strategic intention of the WPK for bringing about a signal turn in nuclear weaponization.
He watched an H-bomb to be loaded into new ICBM.
Saying that he felt the pride of indomitably bolstering up the nuclear forces at a great price while seeing the Juche-oriented thermonuclear weapon with super explosive power made by our own efforts and technology, he expressed great satisfaction over the fact that our scientists do anything without fail if the party is determined to do.
He was acquainted himself with technical specifications and structural and operational characters of the H-bomb.
The scientists further upgraded its technical performance at a higher ultra-modern level on the basis of precious successes made in the first H-bomb test.
Noting that the scientists, technicians, workers, soldiers and officials in the atomic power industry, who have made devoted efforts to raising the level of nuclear weaponization up to its perfection as intended by the Party, are creditable "nuclear combatants" of the Party who are upholding its line of simultaneously developing the two fronts with the strongest nukes, he highly praised their exploits.
Underlining the need for the institute to dynamically conduct the campaign for successfully concluding the final-stage research and development for perfecting the state nuclear force, he set forth tasks to be fulfilled in the research into nukes. -0-
South Korea's National Security Council held a meeting to discuss the incident, presided by President Moon Jae-in, according to South Korea's presidential office.
South Korea's Joint Chiefs of Staff said the military has raised its alert status after detecting a "man-made earthquake near Punggye-ri."
A second, smaller tremor was detected by the USGS and its Chinese counterpart. Both speculated it may have been caused by some sort of structural collapse.
Japanese Foreign Minister Taro Kono says the government has confirmed that North Korea conducted a nuclear test on Sunday.