He made the claim during a visit to a South Korean military base to encourage soldiers for the Lunar New Year’s holidays – and added the military should get fully prepared.
Han said: "North Korea is making threats of nuclear development and intercontinental ballistic missiles (ICBM) this year as well.
“Pyongyang’s missile threat against the Seoul metropolitan area where key facilities and population are concentrated is directly linked to the nation’s security.
“Thus, there should be no weak point in preparation.”
Experts have claims North Korea is likely to test-fire an ICBM in the near future to celebrate the late Kim Jong-il’s birthday on February 16.
The North Korean leader's missiles pose a threat to South Korea, according to defence officials.
Kim Jong-Un in pictures
Mon, January 23, 2017
Kim Jong-Un, The Supreme Leader of North Korea takes himself and his leadership very seriously.
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North Korean leader Kim Jong-Un paying his final respects at the bier of Kang Ki Sop, alternate member of the Central Committee of the Workers' Party of Korea, deputy to the Supreme People's Assembly of the DPRK and general director of the General Administration of Civil Aviation, following Kang's death at an undisclosed location in North Korea.
This comes after a former North Korean deputy ambassador to London claimed the secretive nation’s elite are outwardly expressing discontent towards Kim Jon-un and his government.
Thae Yong-ho, who defected to South Korea in August last year, claimed criticism of Kim’s regime is becoming more frequent.
He said: "When Kim Jong Un first came to power, I was hopeful that he would make reasonable and rational decisions to save North Korea from poverty, but I soon fell into despair watching him purging officials for no proper reasons.
"Low-level dissent or criticism of the regime, until recently unthinkable, is becoming more frequent.
"We have to spray gasoline on North Korea, and let the North Korean people set fire to it."
Thae added North Korea’s political system today has “nothing to do with communism” – and claimed more North Korean diplomats are waiting in Europe to defect to North Korea.