SEOUL - North Korea's recent missile tests involved "tactical nuclear" drills to simulate hitting the South, and were overseen by leader Kim Jong Un in response to US-led joint military exercises in the region, state media said Monday.
Kim made acquiring tactical nukes -- smaller, lighter weapons designed for battlefield use -- a top priority at a key party congress in January 2021, and this year vowed to develop North Korea's nuclear forces at the fastest possible speed.
The country revised its nuclear laws last month to allow pre-emptive strikes, with Kim declaring North Korea an "irreversible" nuclear power -- effectively ending the possibility of negotiations over its arsenal.
Since then, Seoul, Tokyo and Washington have ramped up combined military exercises, including deploying a nuclear-powered US aircraft carrier to the area twice, infuriating Pyongyang, which sees such drills as rehearsals for invasion.
In response, North Korea "decided to organise military drills under the simulation of an actual war" that gamed out hitting South Korea's ports, airports and military command facilities, KCNA said.
North Korean army units involved in "the operation of tactical nukes staged military drills from September 25 to October 9 in order to check and assess the war deterrent and nuclear counterattack capability," the report said.
Kim "guided the military drills on the spot," it said, adding he had dismissed the idea of restarting talks, saying North Korea "felt no necessity to do so".
The report also said that North Korea's October 4 missile launch, which flew over Japan and prompted rare evacuation warnings, involved a "new-type ground-to-ground intermediate-range ballistic missile".
That test aimed to "send more powerful and clear warning to the enemies".
Officials in Washington and Seoul have been warning for months that North Korea has completed preparations for another nuclear test -- which would be the country's seventh, and first since 2017.
"The fears of a nuclear war in Ukraine are no longer someone else's concern," Lim Eul-chul, a professor at Kyungnam University, told AFP.
"We need to take more seriously the fact that the possibility of a nuclear war on the Korean peninsula has increased."