The threat came just days after leader Kim Jong-Un ordered the country's nuclear arsenal to be placed on standby, in response to the sanctions resolution adopted last week by the UN Security Council
North Korean leader Kim Jong-un reiterated that North Korea has successfully miniaturized nuclear warheads to fit onto ballistic missiles in a statement published today by the country's official North Korean Central News Agency (KCNA).
"The nuclear warheads have been standardized to be fit for ballistic missiles by miniaturizing them," affirmed Kim.
According to the article released by KCNA on Wednesday, Kim made the statement during a meeting with scientists and technicians of North Korea's nuclear weapons development program.
North Korea threatened pre-emptive and "indiscriminate" nuclear strikes against South Korea and the United States on Monday, as the two allies kicked off their annual, large-scale military exercises.
Participation in the joint exercises -- known as Key Resolve and Foal Eagle -- has been bumped up this year to involve 300,000 South Korean and around 17,000 US troops, as well as strategic US naval vessels and air force assets.The drills always raise tensions on the divided Korean peninsula and the situation is particularly volatile this year, given the North's recent nuclear test and long-range rocket launch and its fury over tough UN sanctions imposed in response.
In a statement issued hours before the drills began, North Korea's powerful National Defence Commission said it was prepared for an "all-out" military counter-offensive.
Describing the exercises as "nuclear war drills" aimed at undermining North Korea's sovereignty, the statement said the Supreme Command of the Korean People's Army was ready to launch a "pre-emptive and offensive nuclear strike" in response.