'Multiple' N Korea tests warning
6 February 2013 Last updated at 04:13 GMT
South Korea's outgoing leader, Lee Myung-bak, has warned that North Korea could be planning more than one nuclear test, even as the US spoke of consequences if it went ahead.
Lee Myung-bak, who leaves office this month, told Choson Ilbo newspaper that Pyongyang could be planning "multiple nuclear tests at two places or more".
North Korea said in January it was planning a "high-level nuclear test".
The BBC's Seoul correspondent Lucy Williamson was at the conference.