"We must always be ready to fire our nuclear warheads at any time," Kim was quoted as saying by the North's official KCNA news agency today.
Kim also warned that the situation on the divided Korean peninsula had become so dangerous that the North needed to shift its military strategy to one of "pre-emptive attack".
Such bellicose rhetoric is almost routine for North Korea at times of elevated tensions.
According to KCNA, Kim made his comments while monitoring the test firing of a new, high-calibre multiple rocket launcher yesterday, just hours after the UN Security Council unanimously adopted the resolution penalising the North for its recent nuclear test and long-range rocket launch.
South Korea's defence ministry said the North had fired half a dozen rockets about 100-150 kilometres (60-90 miles) into the sea off its eastern coast on Thursday.
In a clear threat to neighbouring South Korea, Kim said the new rocket launcher should be "promptly deployed" along with other newly developed weaponry.
The US-drafted UN resolution adopted by the Security Council late Wednesday laid out the toughest sanctions imposed on Pyongyang to date over its nuclear weapons programme that will, if implemented effectively, apply significant economic pressure to Kim's regime.
The resolution breaks new ground, sanctioning specific sectors key to the North Korean economy - such as mineral exports - and seeking to undermine the North's use of and access to international transport systems.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
