South Korea says its soldiers fired warning shots Saturday at five North Korean soldiers who crossed the two countries' heavily fortified border.
Seoul's Foreign Ministry backed the U.N. Saturday, saying the North must realize a nuclear test "would not give it any benefits." Japan's Foreign Ministry called on the council to take "severely punitive measures" against the North, if a test is carried out.
However, Peter Beck, North Asia Director for the International Crisis Group, says the U.N. statement is unlikely to influence the North's behavior.
"It's a nice-sounding statement, but it's just that -- a statement. It's not a resolution, there's no explicit enumeration of consequences the North will face if it does test."
South Korea said it was sending an envoy to China next week to discuss the North Korea situation.