North Korean leader Kim Jong Un has overseen the test of a new "ultramodern tactical weapon," the North's state-run media reported Friday in the first mention of such a test in months.

Kim hailed the "great success," which he said "serves as another striking demonstration of the validity of the Party policy of prioritizing defence science and technology and the rapidly developing defence capability of the country and as a decisive turn in bolstering the fighting capacity of the Korean People's Army," the North's official Korean Central News Agency said.

The report said that Kim had visited a national defense institute site, overseeing the test of the unspecified new tactical weapon.