SEOUL, Sept. 9 (Xinhua) — The Democratic People's Republic of Korea (DPRK)'s fifth nuclear test is being suspected after a magnitude 5.3 earthquake was detected at a site where its fourth nuclear test was conducted earlier this year, Yonhap news agency reported on Friday.

South Korea's Joint Chiefs of Staff (JCS) was quoted as saying that artificial earthquake waves of magnitude 5.3 were spotted at about 9:30 a.m. (local time) Friday from the DPRK's main Punggye-ri nuclear test site. The JCS is analyzing the details.

All of the four DPRK underground nuclear tests had been carried out in Punggye-ri since 2006. The latest took place in January this year.