The UN Security Council, chaired by South Korea this month, has stepped up its pledge to take "firm and resolute" action against North Korea should Pyongyang go ahead with a nuclear test.
This comes as the governments of the United States and China are also expected to discuss ways to deal with the rogue state.
Choi You-sun reports. Kim Sook, South Korea's ambassador to the UN, says the Security Council is unified and resolute about penalizing North Korea if the Kim Jong-un regime conducts a third nuclear test.
"I would expect very firm and strong measures to be taken in terms of format as well as in substance."
In Resolution 2087, adopted after the North's December 12th rocket launch, the 15-member Security Council had warned it would take "significant action" should Pyongyang provoke again.
The South Korean diplomat, who began his month-long presidency of the Council on Friday, said Security Council members reached a consensus on the need to continue diplomatic efforts to stop North Korea and agreed to enforce even stronger sanctions on the regime, if their efforts fail.
He also said there has been "very busy activity" at the testing site in the far northern part of the country, and it seems a nuclear test is imminent.
The U.S. government, which maintains an unofficial dialogue with North Korea in New York, is also working closely with other members of the six-party denuclearization talks, and specifically with China.
"We've been in constant contact with the Chinese, both in the context of working out Resolution 2087 and since."
China, which had often defended its long-time ally from the international community's criticism in the past, has been pressuring the North not to do anything that would threaten regional security.
U.S. Secretary of State John Kerry, who has said he's already spoken with his counterparts in Seoul and Tokyo about ways to counter Pyongyang's hostile behavior, is expected to discuss the matter with the Chinese foreign minister soon.
Choi You-sun, Arirang News.