North Korean leader Kim Jong Un said his country's test of a "new-type" of guided missile Tuesday was a warning over joint U.S.-South Korea military exercises, state media said Wednesday, amid fears of a possible return to 2017's ramped-up pace of weapons testing and threats of "fire and fury."

The North's official Korean Central News Agency said in a report that Kim had overseen the test-firing of the "tactical guided missiles" from an airfield in the country's west that saw the weapons fly across the country and over the capital, Pyongyang, "to precisely hit" an island target in the Sea of Japan.

"The demonstration fire clearly verified the reliability, security and actual war capacity of the new-type tactical guided weapon system," KCNA reported.