In July, North Korea conducted two tests of intercontinental ballistic missiles (ICBMs) in violation of previous UNSC resolutions, with the state-run Korean Central News Agency (KCNA) stating that the second test, carried out on July 28, was successful.
Analysts say the new sanctions could cut off roughly one-third of North Korea's estimated $3 billion in annual exports and put a huge dent in the funding Pyongyang needs for its weapons programs. He says the North is "ready to teach the US a severe lesson with its nuclear strategic force".
In a statement carried by the North's state-run Korean Central News Agency, North Korea's government said the sanctions were a "violent infringement of its sovereignty" that was caused by a "heinous USA plot to isolate and stifle" the country.
"We will be monitoring that carefully and certainly having conversations with any and all that we see who may not be fully embracing not just the spirit of those sanctions but the operational execution of those sanctions", Tillerson said.
The latest resolution targets North Korea's primary exports - including coal, iron and seafood.
There was no direct reaction from North Korea to the remarks but in a statement after the U.S. secretary of state made his comments, Pyongyang responded robustly to the new sanctions by saying it would exact "thousands-fold revenge" on America.
"The best signal that North Korea can give us that they are prepared to talk would be to stop these missile launches", said Tillerson, adding that "other means of communications" were open to Pyongyang.
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On Saturday, the UN Security Council unanimously adopted Resolution 2371, tightening sanctions against North Korea. The resolution also bans countries from giving any additional permits to North Korean laborers, another source of foreign currency for the North, and prohibits all new joint ventures with North Korean companies.
Kang is echoing Tillerson's praise for the sanctions approved Saturday by the U.N. Security Council. Wang also pressed for a restart of six-party talks involving North and South Korea, the U.S., China, Russia and Japan.
All 10 countries in ASEAN have diplomatic relations with North Korea, including five that have embassies in Pyongyang.
Cambodia has previously made clear it will not back any further nuclear development efforts by North Korea. Negotiations are under way but could be drawn out due to disagreement on the language over the South China Sea issues, a Seoul diplomat told The Korea Herald.
Tillerson said Washington would not "specify a specific number of days or weeks" before deciding that North Korea had indeed stopped its tests.
"Do not violate the U.N.'s decision or provoke worldwide society's goodwill by conducting missile launching or nuclear tests", Wang said he told North Korea's Ri. Foreign Minister Wang Yi unleashed harsh words on sensitive topics against South and North Korea, the U.S., and Japan.