North Korea said it has successfully test-fired an underwater submarine-launched ballistic missile.
Although North Korea is suspected of developing such a missile system, it has never claimed to have conducted a test launching before.
The official KCNA news agency said the leader Kim Jong Un inspected the test-launch "from a location off-shore," and "through the test, it was verified and confirmed that the underwater ballistic missile launch from a strategic submarine fully achieved the latest military, scientific and technical requirements."
It did not say where and when the test is conducted, which is not independently verified.
North Korea is banned from developing or using ballistic missile technology by the UN. A Johns Hopkins University report claimed that "satellite imagery showed possible evidence of work on vertical launch tubes on a submarine that could be for ballistic missiles," in January, Reuters reported.
News of the missile test comes one day after North Korea warned that it will open fire on any South Korean naval ships entering disputed waters.