North Korea on Thursday unveiled a new facility to produce nuclear bomb fuels, with leader Kim Jong-un announcing plans to bolster the country's nuclear forces "at an exponential rate."

SEOUL, June 4 (UPI) -- North Korean leader Kim Jong Un visited a newly inaugurated nuclear materials production facility and vowed to continue rapidly expanding Pyongyang's nuclear arsenal, state media reported Thursday.

SEOUL, June 4 (UPI) -- North Korean leader Kim Jong Un visited a newly inaugurated nuclear materials production facility and vowed to continue rapidly expanding Pyongyang's nuclear arsenal, state media reported Thursday.

North Korea says leader Kim Jong Un has visited a new facility to produce nuclear materials and announced plans to bolster the country’s nuclear forces “at an exponential rate.".