Is South Korea's 'blackout bomb' the answer to the North Korean nuclear threat?

North Korea, Kim Jong-un
It could knock out 80 percent of Kim Jong-un's power. Photo credit: KCNA

Following increasing threats to fire nuclear missiles from North Korea, South Korea has reportedly developed a type of graphite bomb to cripple Kim Jong-un's regime in the event of an attack.

South Korean news agency Yonhap has reported "blackout bombs" have been designed to paralyse the North's power grid by spreading chemically treated carbon graphite filaments.

7 News reports, the bombs that have been previously used during the Gulf War and Serbian War in 1999 knocked out up to 80 percent of power.

South Korea's Agency for Defence Development created the weapons as part of the Kill Chain pre-emptive strike program, according to reports.

"All technologies for the development of a graphite bomb led by the ADD have been secured," a military official said.

"It is at the stage where we can build the bombs at any time."

It comes as US Government officials say they fear North Korea could launch a missile on Tuesday, as the rogue nation celebrates a public holiday.

US Defence Secretary James Mattis warned the US Army to "stand ready" for any attack from North Korea. 

In September, North Korea's most recent missile launch cleared Japan, before crashing into the Pacific Ocean.