North Korean leader Kim Jong Un has called for bolstering nuclear forces this year during a visit to a nuclear material production base and nuclear weapons institute, state media KCNA reported on Wednesday.

South Korea rebuked President Trump’s remarks calling North Korea a “nuclear power,” raising concern about the relationship between the two countries. “North Korea’s denuclearization remains a

North Korean leader Kim Jong Un inspected a facility that produces nuclear material and called for bolstering the country’s nuclear fighting capability, state media reported Wednesday, as the North looks to increase pressure on the United States following the inauguration of President Donald Trump.

Kim Jong-un has inspected a nuclear-material production base and a nuclear weapons institute, emphasizing that strengthening the nuclear shield is "indispensable" amid a long-term confrontation with "the most vicious hostile countries.

Kim Jong Un vowed North Korea's nuclear program would continue "indefinitely" just days after Trump said he would make renewed diplomatic moves to the leader.