The program to equip the navy with nuclear weapons is unerringly following the plan, Kim Jong-Un said during a ceremony on Tuesday, according to the state-controlled KCNA news agency.
This spring, the UN's International Atomic Energy Agency (IAEA) warned that North Korea was showing a "very serious increase" in its capacity to produce nuclear weapons.
Kim Jong-Un also spoke about plans to build 10,000-ton warships.
