The government also said the new UN Security Council resolution was drawn up after close coordination between South Korea and the global community - which the opposition parties claimed was not enough.
He said North Korea's ruling party the Democratic People's Republic of Korea (DPRK) was "ready to use a form of ultimate means".
MICHELE KELEMEN, BYLINE: Hi, Kelly.
A senior administration official briefed reporters last week and also said that the Trump administration has no intention of sitting down with the Kim regime under current conditions and that the plan is to continue to increase pressure on Pyongyang. They say usually negotiators take time quietly behind the scenes to come up with these new sanctions.
Peru stressed that it was committed to a peaceful solution to the dispute and "strict compliance" with resolutions passed by the UN Security Council. Over the weekend, there were negotiations.
There was new political language in the resolution urging "further work to reduce tensions so as to advance the prospects for a comprehensive settlement". And let's just say it has far fewer teeth.
China has in recent years agreed to increasingly expansive UN Security Council sanctions against North Korea, but has repeatedly transgressed when it comes to limiting imports (for example, on coal).
A proposed asset freeze and a travel ban on North Korean leader Kim Jong-un were dropped.
FireEye revealed that groups that appear to be sponsored by North Korea have targeted South Korean cryptocurrency exchanges and service providers.
"It's really not comprehensive enough, or serious enough, really cutting enough to cause the North Koreans any huge problems, as I see it". Trump has vowed not to allow North Korea to develop a nuclear missile capable of hitting the mainland United States.
MCEVERS: The big question now is, how will this resolution be implemented? You know, the British Ambassador Matthew Rycroft said that he thinks it's robust still.
He added: "There is a significant prize in keeping the whole of the Security Council united". Those were his words.
If this U.N. resolution fails to deter the Kim government, Newsham said, the United States would be justified to pursue secondary sanctions against Chinese banks and entities that do business with North Korea.
The United States and its allies face an existential threat from a nuclear weapons-armed Kim regime.
A Blue House official reiterated Sunday that the issue has never come up between the two allies and the South Korean government stands by its original position that USA tactical nukes would not be allowed on domestic soil. On Twitter, he's been pretty adamant about that.
Washington has said military action remains an option in dealing with Pyongyang and has threatened to cut economic ties with countries that continue to trade with it. Secretary of State Rex Tillerson held talks in Washington on Tuesday with China's top diplomat, State Councilor Yang Jiechi, at which details of the trip were expected to discussed.
Both Russia and China reiterated their proposal that the United States and South Korea freeze all military drills - which anger North Korea - and asked for a halt in the deployment of the controversial anti-missile system Thaad, in exchange for Pyongyang's cessation of its weapons programmes.
MCEVERS: NPR's diplomatic correspondent Michele Kelemen, thank you.