North Korea has reportedly carried out a submarine-launched ballistic missile (SLBM) test firing in the Sea of Japan.
Yonhap news agency reported that the missile "ended in failure with no indication that the missile successfully ejected from the vessel and took off."
South Korean defence ministry declined to confirm the test firing, however, a government source was quoted by the news agency as saying: "There is no identification of a missile taking flight and only fragments of a safety cover was observed so it's highly likely that the launch was a misfire."
Meanwhile, the country's official KCNA news agency reported that North Korean leader Kim Jong-Un was present to oversee the firing and said the launch was "an eye-opening success."
The latest test firing follows North Korea conducting a successful underwater test of a newly developed ballistic missile in May this year.
The test is in direct violation of the UN Security Council resolutions that restrict North Korea from using ballistic missile technology.
Reports emerged in April this year that the country conducted a third test of a new SLBM from an underwater test platform near the country's coastal city of Sinpo.
Previous tests of the KN-11 missile were conducted in January and October 2014. The first test was carried out onboard a sea-based platform, and the second test was launched from a land-based static platform.