Asked if he was confirming that the North Korean missile launch did have a controlled reentry into the atmosphere, Mattis said Friday: "No, I was not".
Speaking to reporters, Kim hailed the test launch and said that if the Trump administration wants peace on the divided Korean Peninsula, it should replace the armistice that ended the 1950-53 Korean War with a peace accord and halt its anti-North Korea policy.
Kim said the North would not abide by United Nations resolutions, which "lost their legitimacy, legality and impartiality", until the worldwide community recognizes its right to "self-defensive measures" and the US ends its "provocative maneuvers".
North Korea is aiming to complete development of an intercontinental ballistic missile that is capable of attacking the contiguous United States.
The announcement comes as two US officials told NBC News that the KN-17 launch last weekend was successful and that the missile's re-entry vehicle successfully re-entered the atmosphere.
"It is the stance of the DPRK to continuously develop more precise and diversified and nuclear strike means and push ahead preparations for more tests till the US and its vassal forces make a proper choice with the regions", Kim said.More news: Irish finance minister to step down when PM goes next month
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In a separate statement, a Central Intelligence Agency analyst said this week Iran and North Korea are working together to improve their respective missile programs, according to CNBC.
Haley also raised concerns about an application by North Korea to patent a process to produce sodium cyanide, which can be used to make the nerve agent Tabun and is also used in the extraction of gold.
The U.N. Security Council first imposed sanctions on North Korea in 2006 and has strengthened the measures in response to the country's five nuclear tests and two long-range rocket launches.
Its ambassador to China said in Beijing on Monday it would continue such test launches "any time, any place".Trump and new South Korean President Moon Jae-in will meet in Washington next month, with North Korea expected to be high on the agenda, the South's presidential Blue House said.
North Korea submitted the patent application to a United Nations agency, the World Intellectual Property Organization (WIPO), for processing. Under U.N. sanctions, states are banned from supplying North Korea with sodium cyanide and Pyongyang has to abandon all chemical and biological weapons and programs.