New Delhi, Nov. 18 -- North Korea on Tuesday said South Korea's plan to build nuclear-powered submarines with US approval would trigger a "nuclear domino" effect, claiming that the agreement revealed the "true colours of the confrontational will" of the US and South Korea to "remain hostile" towards North Korea.

The agreement and a series of large-scale joint military drills by the two countries posed grave challenges to the North's security and aggravated regional tensions, said North Korea, reported state news agency KCNA.

North Korea's accusations comes after South Korea's government announced that it has finalised an agreement to build nuclear-powered submarines in partnership with the United States.

On Friday, South Korea and the ...