North Korea said Thursday that leader Kim Jong Un supervised successful tests of two types of missiles—one designed to carry a “super-large conventional warhead” and the other likely for a nuclear warhead, as he ordered officials to bolster up his country’s military capabilities to repel United States-led threats.

The tests appear to be the same as the multiple missile launches that neighboring countries said North Korea performed Wednesday, extending its run of weapons displays as confrontations with the US and South Korea escalate.