Kim Jong-Un says North Korea has miniaturised nuclear warheads: state media

North Korean leader Kim Jong-Un says his scientists have successfully miniaturised nuclear warheads to place on a ballistic missile and create a "true" deterrent, state media said Wednesday.

"The nuclear warheads have been standardised to be fit for ballistic missiles by miniaturising them," Kim noted during a meeting with nuclear technicians, the North's official KCNA news agency said.