North Korea tested its own intermediate-range hypersonic missile incorporating artificial intelligence (AI) technology days before South Korea launched its version. (EPA Images pic)SEOUL: South Korea's military on Friday dismissed Pyongyang's doubts over Seoul's homegrown hypersonic missile launch, as the two Koreas appear to be intensifying an arms race over the high-tech weapons.

Hypersonic missiles travel at more than five times the speed of sound and can manoeuvre mid-flight, making them significantly harder to track and intercept.

Days after North Korea announced it tested an intermediate-range hypersonic missile that involved the use of AI earlier this month , Seoul test-fired its own weapon -- calling it a "key strategic asset capable of changing the course of the battlefield".