Military aid provided to Russia by North Korea is the most damaging for Ukraine, intelligence chief Kyrylo Budanov said on September 14 at a conference in Kyiv. "Our biggest problem from all these allies of Russia is from North Korea. Because with the volume of military products that they supply, they actually affect the intensity of the fighting," Budanov said. His remarks came as North Korean leader Kim Jong Un pledged to deepen ties with Russia. Kyiv has been monitoring arms deliveries from Pyongyang to Moscow and feels their effect on the battlefield. "There is a direct correlation. They are supplying huge volumes of artillery ammunition, which is critical," Budanov said.