North Korean ballistic missiles fired at Ukraine by Russian forces since late December have been far more precise than salvos of the weapons launched over the past year, two senior Ukrainian sources told Reuters.

North Korea lashed out at U.S. Secretary of State Marco Rubio for calling it a “rogue” state and warned Monday that such “coarse and nonsensical remarks” will never contribute to U.S.

"The worst problem we are facing is the one coming from North Korea," the head of Kyiv's military intelligence agency said in the fall.

It also shed some light on the mindset and training of the conscripted North Korean soldiers sent to fight Russia’s war a continent away from their home. Highly disciplined, ready to die but also very young and with little battlefield experience they elicited curiosity and even some pity from the Ukrainian soldiers who captured them during two separate missions on Jan.

North Korean ballistic missiles have been striking targets in Ukraine with increasing accuracy in recent weeks compared to over the past year — suggesting the Hermit Kingdom is using the battlefield as a testing ground for its new tech.