North Korean officials involved in the recently tested submarine-launched ballistic missile (SLBM) hit back against Seoul’s claim of it having a range of just 30 kilometers, which would not be advanced enough to use for strategic purposes.

A scientist said Pyongyang will further develop their weapon systems to produce more and better cutting-edge strategy weapons.

“As one of the military officials who participated in the recent SLBM launch, our ballistics – following our own underwater launch mechanism – have reached a technical level sufficient to conduct attacks from underwater at any given time,” North Korean strategy submarine officer Lee Myung Sung wrote