North Korea’s Wednesday morning submarine-launched ballistic missile (SLBM) test was a success, state media said on Thursday, describing it has having been carried out without “adverse impact” on neighboring countries.

The launch, which was conducted under the supervision of Kim Jong Un at around 5:30AM SKT from North Korea’s East Coast traveled some 500km South Korea’s Joint Chief of Staff (JCS) said on Wednesday.

Kim Jong Un “appreciated the test-fire as the greatest success and victory… (describing it as) a great manifestation and demonstration of the tremendous power and inexhaustible muscle of the DPRK,” the Korea Central News Agency (KCNA)