The statement said supreme leader Kim Jong Un guided the said test-fire on the spot.

It went on:

The DPRK came into the possession of another powerful nuclear attack means.

The big success of the test-fire serves as a great victory of the Songun revolutionary leadership of Marshal Kim Jong Un.

And it is a proud present of the DPRK's scientists and technicians in the field of national defence extending to the Seventh Congress of the Workers' Party of Korea (WPK) and the 84th founding anniversary of the Korean People's Army (KPA).

As regards the big success in the test-fire of strategic submarine-launched ballistic missile, we extend warm congratulations to the Marshal, the WPK, the DPRK government, the KPA and the Korean people.