Japan, the United States and South Korea warned North Korea on Monday of additional sanctions if it conducts another nuclear test, while agreeing to cooperate in dealing with North Korea's nuclear threat.
"We made it clear we would make North Korea pay the corresponding cost if it pushes ahead with a nuclear test," Hwang Joon-kook, a South Korean diplomat, told reporters after meeting his Japanese and U.S. counterparts in Washington.
The message from the three countries' senior diplomats dealing with the North Korean nuclear issue followed the North's recent threat that it could conduct "a new form" of nuclear test.