North Korea said Wednesday it has successfully conducted a ground jet test of a solid-fuel engine for a new-type intermediate-range hypersonic missile under the supervision of leader Kim Jong-un.Kim oversaw the test carried out the previous day by the North's Missile Administration at the Sohae Satellite Launching Ground, according to the Korean Central News Agency (KCNA)."The respected Comrade Kim Jong-un said that the military strategic value of this weapon system is appreciated as important as ICBM from the security environment of our state and the operational demand of the People's Army and enemies know better about it," the KCNA said.ICBM refers to an intercontinental ballistic missile.The test came just a day after the North conducted firing drills involving super-large multiple rocket launchers. The South Korean military said Monday it detected the firing of multiple short-range ballistic missiles from areas near Pyongyang.Source: Yonhap News Agency