The United States, which has 28,500 troops in South Korea to guard against the North Korean threat, has called on China to do more to rein in its neighbour.
"It is considered an IRBM [intermediate range ballistic missile] of enhanced caliber", he said, referring to a class of missile created to travel up to 1,860 to 2,485 miles.
North Korea conducted its latest ballistic missile test on Sunday in defiance of UN Security Council resolutions, saying it was a test of its capability to carry a "large-size heavy nuclear warhead".
On Friday, he plans to meet with leading academics and experts on Korea-US relations.
Haley said the Security Council is going to send a strong and unified message to North Korea that "the worldwide community wants to support you but as long as you test, and as long as you continue your nuclear program, you are on an island by yourself".More news: The return of Twin Peaks
North Korea on Sunday test-fired what analysts say was its longest-range rocket yet as it accelerates efforts to develop an intercontinental ballistic missile (ICBM) capable of delivering a nuclear warhead to the continental United States.
Thousands of citizens gathered on Thursday to cheer on the scientists over the successful launch of Hwasong 12, the medium-range missile fired on Sunday, the Korean Central News Agency (KCNA) said.
Moon's apparent reluctance might be a result of South Korea's psychological warfare with China, which sees Thaad as a threat to its own military operations. The president has said he would be willing to engage in talks with North Korea, but the White House responded to the latest test by saying the country "has been a flagrant menace for far too long".
It also amounted to a first test of South Korea's new president, Moon Jae In, a liberal who favors dialogue and engagement with North Korea.
"The reality is that there is a high possibility of a military conflict at the NLL (Northern Limit Line) and military demarcation line", Moon said. She also said that North Korea is a threat not just to the United States, but to the entire world.More news: Oil down as market stays well supplied despite OPEC cuts
Haley answered Putin and others who have made similar comments about the United States: "What about North Korea intimidating us?" Hong said South Korea had not yet received official word from Washington on whether Seoul should pay for a US anti-missile system that has been deployed outside Seoul.
The test followed Pyongyang's two previous failed attempts last month. The newly-elected President's statement came as Pyongyang continues to press ahead with its nuclear and missile programmes.
All 15 members of the Security Council including North Korea's closest ally China called the launch a violation of United Nations sanctions and vowed to take new measures, including additional sanctions.
"We border them, and in fact we can not but be perplexed when they improve their missile technology (and) nuclear potential.It worries us".More news: Djokovic, Nadal through easily but Murray crashes out in Madrid
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