North Korea announces opening of a new nuclear facility

The South's military did not immediately release further details.

Kim made the visit the previous day, accompanied by key party officials, the Korean Central News Agency (KCNA) reported, without disclosing the facility's location or other details.

North Korean Supreme Leader Kim Jong-un has ordered workers at a brand-new nuclear production facility to accelerate the manufacture of fresh atomic weapons in order to bolster the country's ever-growing arsenal.

Kim Jong Un called for North Korea's capacity to produce weapons-grade uranium to grow at an "exponential rate."