Kim has often visited Mount Paektu, the highest point on the Korean Peninsula, before making major decisions such as the 2013 execution of his powerful uncle and his 2018 entrance into diplomacy with Seoul and Washington.
Defence officials in Seoul said Pyongyang fired what appeared to be two short-range ballistic missiles Friday, that flew some 230 kilometres (140 miles) before splashing down in the sea between the Korean peninsula and Japan.
South Korea's president on Monday called a recent U.S.-North Korean summit at the Korean border, an end of mutual hostility between the countries, despite skepticism that it's was a just made-for-TV moment that lacked any substance.
The missile test, North Korea's first since 2017, serves as a clear warning of leader Kim Jong-un's frustration at the state of talks with the US, which have been deadlocked since President Donald Trump walked out of their Vietnam summit early in February.
The Center for Strategic and International Studies said, that the satellite imagery of the Yongbyon nuclear site on April 12 showed five railcars near its uranium enrichment facility and radiochemistry laboratory.
The upcoming meeting between Kim Jong Un and Donald Trump will have a momentous impact on North Korea—but the delicious paradox is that all bets are off on that one, including on whether it takes place or not