North Korea 'earthquake' amid nuclear test fears
12 February 2013 Last updated at 05:28 GMT
Seismic activity has been detected in North Korea, several nations say, in what could be a sign of a widely-anticipated nuclear test.
The US Geological Survey said it had detected a tremor with a 4.9 magnitude.
South Korean media also reported a "man-made earthquake" in its northern neighbour.
North Korea said last month it was planning to carry out its third nuclear test - despite a threat from the UN Security Council of "consequences".
James Kelly reports.