President Donald Trump responded earlier this week with a warning that North Korea would be subject to "fire and fury like the world has never seen" if it continues its threatening behavior, prompting Pyongyang to respond by threatening to surround the USA territory of Guam with an "enveloping fire".
Trump's rhetoric has become considerably more bellicose in recent days.
Though earlier this week Trump touted a U.N. Security Council vote to boost sanctions against North Korea, an effort spearheaded by Haley, yesterday he expressed doubt that diplomacy would be effective.
North Korea has announced plans to fire missiles near the United States territory of Guam.
It said the plan could be finalised within a week or so and would then go to leader Kim Jong Un for approval.
A Japan Self-Defense Force member stands by a PAC-3 Patriot missile unit deployed for North Korea's rocket launch at the Defense Ministry in Tokyo, Sunday, January 31, 2016. His administration had hoped China would step up pressure on Pyongyang to quit with the missile tests but another ICBM test occurred on July 28.
"And we work very closely with allies to ensure that this is not unilateral either ... and of course there's a military solution", Mattis said yesterday.
North Korea carried out its second intercontinental missile test on July 28, later claiming that it now had the capability to reach all of the U.S. mainland.
On Thursday North Korea threatened to use its young people to "blow the U.S. from this planet". "I can say this, your tourism, you're going to go up like tenfold with the expenditure of no money, so I congratulate you".
He then called the Governor of Guam, Eddie Calvo, and assured him that the United States military would "ensure the safety and security of the people of Guam, along with the rest of America". "Because things will happen to them like they never thought possible, okay".
Pyongyang responded several times this week with similarly escalating threats from North Korean officials.
"The relationship between the two Presidents is an extremely close one, and will hopefully lead to a peaceful resolution of the North Korea problem", it said.
Key Pyongyang ally Beijing, meanwhile, has pleaded with Trump to tone down his rhetoric to prevent tensions from boiling over.
Turnbull added: "If North Korea decides to carry out some of its violent threats, then obviously awful consequences will follow".
"Though I don't want the temperature to get any higher, I think it's important also that there is clarity and that if there is an attack on American soil including Guam, that it will be met with overwhelming response", Calvo told reporters on Friday.