Kim Yeon-chul, South Korea's point man for relations with the North, resigned over heightened tensions on the peninsula days after Pyongyang blew up its liaison office with the South.
US, Russia, UK, France, China, Pakistan, India, Israel and North Korea together possessed an estimated 13,400 nuclear weapons at 2020 begining, Swedish peace research institute says.
South Korea made the statement after the sister of North Korea's leader warned of retaliatory measures against the country over anger toward defectors sending back propaganda leaflets.
For several days, North Korea has lashed out at South Korea, threatening to close an inter-Korean liaison office and other projects if the South does not stop defectors from sending leaflets and other material into the North.
A stronger relationship between the two will trigger another headache for the US, but this time in its own hemisphere.
A meeting chaired by Kim Jong-un also discussed increasing the capabilities for deterring “the threatening foreign forces," according to state media KCNA.
South Korea responded to shots fired from across the DMZ but no casualties were reported.
North Korean leader Kim Jong-un made his first public appearance in 20 days as he celebrated the completion of a fertilizer factory near Pyongyang, state media said, ending an absence that triggered global rumors that he was seriously ill.
North Korean media has not reported on Kim Jong-un's whereabouts since he presided over a meeting on April 11, provoking intense speculation about his health.
It is believed that Kim Jong Un has been found in the eastern city of Wonsan amid speculation that his health is failing.
Conjecture over Kim has grown since his conspicuous no-show at April 15 celebrations for the birthday of his grandfather Kim Il Sung, the North's founder – the most important day in the country's political calendar.
Rumours have been circulating about the health status of North Korea's leader, who was last seen in public on April 11 and was not in attendance for the country's most important holiday.
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