North Korea has reportedly carried out a successful underwater test of a newly developed ballistic missile, increasing the country's defence capabilities.
According to country's official KCNA news agency, North Korean leader Kim Jong-Un was present to oversee the launch.
Kim Jong-Un said that the country has now possessed a: "world-level strategic weapon capable of striking and wiping out in any waters the hostile forces infringing upon (North Korea's) sovereignty and dignity." .
This new development would violate UN Security Council resolutions that restricte North Korea from using ballistic missile technology.
A statement from the State Department, which made no comment on the reported test, read: "We call on North Korea to refrain from actions that further raise tensions in the region and focus instead on taking concrete steps toward fulfilling its international commitments and obligations."
Since the test, reports have emerged that North Korea fired three anti-ship cruise missiles into the sea, off of the east coast of South Korea.
In April, North Korea reportedly conducted a third test of a new submarine-launched ballistic missile (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, while the second test was launched from a land-based static platform.