Magnitude-5.3 earthquake was reported, probably due to the probe
The DPRK conducted successful test of the nuclear weapon, 112.international reports.
The test is reported to be the most powerful one that has ever taken place in the DPRK, Yonhap agency says.
South Korean authorities assess the charge to be only 6 kilotons weaker than the U.S. nuclear bomb that hit Hiroshima in 1945.
Pyongyang has warned the United States that it is ready to make a preemptive nuclear strike in the event of any provocation against North Korea.
As reported earlier by 1492news.com, DPRK MFA: 'North Korea has a set of substantive measures that can turn into ashes aggressive US troops'