Preparations by North Korea for another nuclear test were under way but there were no signs of an immediate test, South Korea's intelligence agency said on Tuesday.
The assessment was delivered by two South Korean lawmakers who attended a closed-door parliamentary audit of the National Intelligence Service (NIS), Xinhua news agency reported.
Pyongyang seemed to have prepared for its fourth nuclear test, though not immediately, according to human and technical intelligences collected by the spy agency, the two legislators said.
North Korea has previously conducted nuclear tests in 2006, 2009 and 2013.
