North Korea has confirmed it successfully tested a new submarine-launched ballistic missile on Tuesday.
State news outlet KCNA said the missile had “advanced control guidance technologies”, which could make it harder to track.
North Korea has carried out a flurry of weapons tests in recent weeks, launching what it said were hypersonic and long-range weapons.
The UN prohibits it from testing ballistic missiles and nuclear weapons.
Ballistic missiles are considered more threatening than cruise missiles because they can carry more powerful payloads, have a longer range and can fly faster.
North Korean state media on Wednesday said its latest missile had new “controlling and homing” technology which allowed it to move laterally. It was also capable of “gliding and jumping movement”.
It said it was fired from the same submarine that launched an older missile in a 2016 test.
On Tuesday, South Korea’s Joint Chiefs of Staff said one missile had been launched from the port of Sinpo, in the east of North Korea where Pyongyang usually bases its submarines.
It landed in the East Sea, also known as the Sea of Japan, and travelled about 450km at a maximum height of 60km.
Japanese Prime Minister Fumio Kishida has called the launch “very regrettable”.