 It was assumed this was part of an assassination attempt.In May 2017, the North Korean government stated that the Central Intelligence Agency (CIA) of the United States and the South Korean National Intelligence Service (NIS) hired a North Korean lumberjack who worked in Russia to assassinate Kim with a "biochemical weapon" that was both radioactive and nano-poisonous, and whose effect would have been delayed by a few months.North Korea said that it would seek extradition of anyone involved in the assassination attempt.