North Korea released a video showing North Korean leader Kim Jong Un watching a missile eject from underwater, going up vertically into the air, just three days after the country stated that it conducted a hydrogen bomb test.

The video is not dated, but the reporter says the launch was conducted in December.

According to US officials, the test was conducted near Sinpo, a port city located on the North Korean coast of the Sea of Japan, as Sputnik reported.

Also, South Korean media said that the video released is a compilation of various tests and not a demonstration of a full successful SLBM launch.