She said members are working on a statement responding to the latest North Korean missile launch that failed.
In response to these developments, North Korean government officials reportedly gave a statement to CNN, saying "We will make the USA fully accountable for the catastrophic consequences that may be brought about by its high-handed and outrageous acts".
China has asked for a return to negotiations on the Korean peninsula to bring about a peaceful resolution to the dispute. Everybody's been outplayed. They've all been outplayed by this gentleman and we'll see what happens.
North Korea has been threatening to destroy Japan, South Korea and the U.S. if the allies provoke tensions in the Korean peninsula.
Many South Koreans are using those words to describe the president of their most important ally, rather than the leader of their archrival to the North.
"If the United States is reckless enough to use military means, it would mean from that very day an all-out war", Han said.
Statements of that vein do not help the situation, according to the Chinese Foreign Ministry spokesman.
"It's a clear fact acknowledged by the global community that, for thousands of years in history, Korea has never been part of China", foreign ministry spokesman Cho June-hyuck said at a briefing in Seoul on Thursday, Bloomberg reported.
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The threat, however, was not the first time that North Korea has promised to destroy its neighbor to the south, as well as to launch a devastating attack against the United States.
New footage from North Korea's birthday celebrations for founding father Kim Il-sung has revealed the extravaganza ended with a bang, showing a mock-up video of missiles striking the United States that drew cheers from the audience and smiles from leader Kim Jong-un.
Meanwhile, 1,250 USA marines arrived in Australia yesterday "ready to fight" North Korea should war break out.
Another part of the Seventh Fleet, the USS Carl Vinson, is expected to be sent to the Sea of Japan (East Sea) as a show of force against the North Korean regime.
South Korea's acting president, Hwang Kyo-ahn, at a meeting with top officials on Thursday, repeatedly called for the military and security ministries to maintain vigilance.
When asked about the Vinson's movements Wednesday, Lu was measured in his response, reiterating at one point, "we maintain close contacts with the U.S. on the current situation".
In fact, in addition to an arsenal of what experts estimate to be 20 nuclear weapons, North Korea also has about 10,000 artillery tubes capable of firing up to 500,000 shells per hour along the Demilitarized Zone line and aimed at the South Korean capital of Seoul - with its population of 25 million a mere 35 miles from the DMZ.