KCNA said it flew to an altitude of 1,312 miles (2,111 km) and travelled 490 miles before landing in the Sea of Japan, near Russia.
KCNA said, it was developed at the Nano Technology Institute at Kim Il-sung University, but, as with the case with the liver medicine, gave no details on when it would made commonly available.
Undeterred, Ki said the spending surge would helped with undertake "the grandiose plan of the party," as KCNA put it.
Its KCNA news agency said it had used a "miniaturized" and lighter nuclear device, indicating that it had again used plutonium which is more suitable for use as a missile warhead.
Kim Jong-un "set forth tasks to be fulfilled in the research into nukes", KCNA said, but it made no mention of plans for a sixth nuclear test.
Kim had "set forth tasks to be fulfilled in the research into nukes", KCNA said, but it made no mention of plans for a sixth nuclear test.
Kim Jong Un "set forth tasks to be fulfilled in the research into nukes," KCNA said, but it made no mention of plans for a sixth nuclear test.
State editorial attacks Obama with racial slurs - The North Korean state news agency KCNA took its anti-US rhetoric to a higher, more disturbing level last Friday, as it published an English-language editorial calling President Barack Obama a "wicked black monkey".
"In the process of investigation he admitted that he committed crimes aimed to topple the DPRK with hostility toward it," the KCNA said at the weekend, referring to the North by its official name the Democratic People's Republic of Korea.
"The Supreme Court sentenced him to 15 years of compulsory labor for this crime," it cited KCNA, the North Korean news agency, as saying.
