North Korean leader Kim Jong-un has called for a greater nuclear war deterrence and increased military power.

The tubby tyrant, 37, said "we must do everything we can" to build it.

He made the remarks at the end of a rare meeting of the ruling Workers’ Party, state news agency KCNA reported.

The congress took place less than two weeks before US President-elect Joe Biden takes office.

It also comes amid a prolonged gridlock in talks aimed at ending the hermit kingdom’s nuclear and missile programmes in return for US sanctions relief.

According to state media publication KCNA, the dictator said: "We must do everything we can to increase nuclear war deterrence even further as we build the strongest military capability."

Kim Jong-un
The tyrant called for an increase in the nuclear war deterrence

The congress also saw Jong-un cement his power with his election as party general secretary.

He announced a self-declared halt on nuclear and intercontinental ballistic missile (ICBM) tests in 2018.

Since then, he has called for continued production of nuclear weapons for his arsenal and launched a series of smaller missiles.

At a parade last October, he unveiled what would be North Korea's largest ICBM yet.

Kim Jong-un made the remarks at a congress

Benjamin Katzeff Silberstein, an expert at the US-based Stimson Center think-tank, said the congress also showed how Jong-un is continuing to tighten state control over society as well as the economy.

Meanwhile, his sister Kim Yo-jong, a member of the party’s central committee, criticised South Korea's military for monitoring a parade in Pyongyang on Sunday.

The move was an expression of a "hostile approach" towards North Korea, she claimed.

Her remarks come after South Korean President Moon Jae-in pledged to help forge a breakthrough in stalled denuclearisation talks.

North Korean soldiers march on Kim Il-Sung square during a military parade marking the 60th anniversary of the Korean war armistice in 2013

Moon Seong-mook, a former South Korean military official and head of the Unification Strategy Center in Seoul said she has been serving as her brother's "de facto second-in-command".

He added: "She didn't mention dialogues with South Korea at all, even though the statement came a day after Moon's New Year's speech, which hints that talks or meetings are distant."