Baku-APA. North Korea announced a successful test of a hydrogen bomb in a special statement broadcasted by the central TV and South Korean TV channels, APA reports quoting Sputnik.
According to the statement, Pyongyang claimed the reason for the test was the country's right for "self-defense," and promised not to use nuclear weapons if the international community respects its sovereignty.
Earlier, South Korea claimed that North Korea might have conducted a nuclear test on Wednesday, which caused an earthquake in the country.
​South Korea's weather service reported that the earthquake was of an "artificial nature." The USGS say that the earthquake was of 5.1 magnitude with the epicenter located in Pekam county, in Yangkang province.
​South Korean sources reported that the earthquake occurred near the town of Kilchu.
South Korean intelligence claims that North Korea did not notify the United States and China about their plans to conduct a nuclear test, the Yonhap agency reports, citing a representative of South Korean intelligence service.
In 2003, Pyongyang withdrew from the international Nuclear Non-Proliferation Treaty (NPT), a deal that was intended to prevent the spread of nuclear weapons manufacture and possible use.
In 2005, North Korea declared itself a nuclear power, and conducted several nuclear weapons tests, sparking concerns in the international community, particularly in neighboring South Korea. Almost four years later, Pyongyang tested additional nuclear weapons.
The official data on the country's nuclear program has not been released, and research on the issue is based on external observations and reports made by North Korean authorities.