Kim Jong Un warns North Korea would 'preemptively' use nuclear weapons

North Korean leader Kim Jong Un warned yet again that the North could preemptively use its nuclear weapons if threatened, as he praised his top military officials over the staging of a massive military parade in the capital, Pyongyang, this week.

Kim expressed a "firm will" to continue developing his nuclear-armed military so that it could "preemptively and thoroughly contain and frustrate all dangerous attempts and threatening moves, including ever-escalating nuclear threats from hostile forces, if necessary", the North's official Korean Central News Agency said Saturday.

KCNA said Kim called his military officials to praise their work on Monday's parade, where the North showcased the biggest weapons in its military's nuclear programme, including intercontinental ballistic missiles that could potentially reach the US homeland and a variety of shorter-range solid-fuel missiles that pose a growing threat to South Korea and Japan. KCNA didn't say when the meeting took place.

Kim's recent remarks followed a fiery statement released by his powerful sister earlier this month in which she blasted South Korea's defence minister for touting preemptive strike capabilities against the North and said her country's nuclear forces would annihilate the South's conventional forces if provoked.

President-elect Yoon Suk-yeol during his campaign also talked about enhancing the South's preemptive strike capabilities and missile defences as he vowed to strengthen the South's defence in conjunction with its alliance with the United States.

While Kim's collection of ICBMs has grabbed much international attention, North Korea since 2019 has also been expanding its arsenal of short-range solid-fuel missiles threatening South Korea.

The North describes some of those missiles as "tactical" weapons, which experts say communicate a threat to arm them with smaller battlefield nukes and use them during conventional warfare to overcome the stronger conventional forces of South Korea and the United States, which stations about 28,500 troops in the South.

North Korea has conducted 13 rounds of weapons launches in 2022 alone. Photo / AP

North Korea may use its next nuclear test to claim it has created a nuclear warhead small enough to fit on those missiles or other weapons it tested this year, including a purported hypersonic missile, analysts say.

"Solid-fuelled missiles are easier to hide, move and launch quickly, making them less vulnerable to a preemptive strike," said Leif-Eric Easley, a professor of international studies at Seoul's Ewha Womans University.

"Taken together with ambitions for tactical nuclear warheads, submarine-based launch capabilities, and more sophisticated ICBMs, Pyongyang is not simply looking to deter an attack. Its goals extend to outrunning South Korea in an arms race and coercing the United States to reduce sanctions enforcement and security cooperation with Seoul," Easley added.

Nuclear negotiations between Washington and Pyongyang have been stalled since 2019 because of disagreements over a potential easing of US-led sanctions in exchange for North Korean disarmament steps.

Kim has stuck to his goals of simultaneously developing nuclear weapons and the country's dismal economy in the face of international pressure and has shown no willingness to fully surrender a nuclear arsenal he sees as his biggest guarantee of survival.