South Korea builds anti-North Korea ‘blackout bomb’

South Korea has the know-how to take out North Korea's power grid in case a war breaks out in the peninsula again, according to a military source Sunday.

The South has been holding regular talks with the United States to counter Pyongyang's development of weapons of mass destruction following the reclusive North's sixth ever nuclear test last month.

While analysts fear a repeat of the 1950-53 Korean War would be devastating for the region and beyond, Seoul has reportedly been working on a non-lethal strategy to quickly contain its neighbor.

"All technologies for the development of a graphite bomb led by the ADD [Agency for Defense Development] have been secured.

"It is in the stage where we can build the bombs anytime," a military official was quoted as saying anonymously by local news agency Yonhap.

Such weapons -- deployed by the U.S. and NATO in the past -- use chemically-treated carbon graphite filaments to short-circuit power grids.

American President Donald Trump took to social media Saturday to insist "only one thing will work" after decades of attempted dialogue and broken agreements with North Korea.

Trump has previously threatened to "totally destroy" the North if needed.

Tensions could be set for another spike if North Korea goes ahead with an expected long-range ballistic missile test to align with its ruling party's founding anniversary on Oct. 10.