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

North Korean leader Kim Jong Un visits the country's nuclear material production base and nuclear weapons institute, at an undisclosed location in North Korea, in this photo released by North Korea's official Korean Central News Agency on January 29,

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.