North Korean state-run television KRT quoting a foreign ministry statement says that the military is ready to respond any American aggression.

Tensions have risen sharply in recent months as North Korea conducted two nuclear weapons tests last year. And also, carried out a steady stream of ballistic missile tests.

On the other hand, the U.S. President Donald Trump vows to prevent North Korea from being able to hit the United States with a nuclear missile.

A Washington-based North Korea monitoring project claims that with the help of satellite visuals, it had found some activity under way at North Korea’s Punggye-Ri nuclear test site.