South Korea is observing movements at a site in North Korea where the communist country is believed to have conducted its first nuclear test, indicating it may be preparing for another blast, Yonhap news agency reported Saturday.
South Korean is keeping a close eye on movements of trucks and North Korean soldiers at the site in Punggye-ri in North Korea's northeast, the report said, citing multiple unidentified military officials.
"It is clear there are movements at Punggye-ri after the nuclear test," one military official was quoted as saying. "We are closely monitoring to see if these are preparations for a second nuclear test."
Another official also confirmed activities at the North Korean site, but said another test "is not believed to be imminent," according to Yonhap.
North Korea conducted an underground nuclear test on Oct. 9, prompting the UN Security Council to adopt a sanctions resolution.