South Korea will respond to the North's activities with all available means, it added, without elaborating on what actions it might take.
We may not be heading for a world war, but we could be heading for a world at war. Here's a look at the big conflicts around the world, and ones that could soon erupt, with nuclear-armed nations.
The South Korean military spokesperson warned that North Korea was making preparations to blow up the border as soon as Monday.
North Korea is providing up to half of the artillery shells used by Russia in Ukraine. Experts warn of growing cooperation, including potential transfers of advanced weapons systems.
Israel should clarify its nuclear stance and take action against Iran while it’s not yet nuclear to maintain its strategic advantage.
Russia warns that Ukraine’s Western-backed attack on its territory could spark a global war, accusing NATO of involvement.
North Korea's nuclear ambitions pose urgent threats globally, but their implications for Israel are often overlooked. Let's find out what they entail.
North Korea views Israel as a satellite state of the US. Israel therefore remains a collateral damage in Pyongyang-Washington strategic rivalry.
Hackers, known as Anadriel or APT45, are stealing classified military secrets for North Korea's nuclear program. The US, Britain, and South Korea warn that these hackers target global defense firms.
Experts explain nuclear blackmail as Kremlin seeks to deter Western support for Ukraine.