South Korea's nuclear agency said Saturday it is still seeking confirmation of whether a North Korean weapon test was nuclear, despite US findings showing consistencies with an atomic blast.
South Korea's government-affiliated Korea Institute of Nuclear Safety would not comment on the US findings, released Friday, that indicate a sample of air taken after Monday's test contained radioactive debris consistent with an atomic explosion.
The agency is currently studying seawater samples collected off South Korea's east coast to seek separate signs of abnormal radioactivity from North Korea, institute official Han Seung-jae said. Results are expected next week.
South Korean monitoring has so far detected no abnormal levels of radioactivity in South Korean air or rainwater, but officials have cautioned the findings do not indicate North Korea did not conduct a nuclear test or that a nuclear test had failed.