North Korea has sent a letter to Australia's parliament warning their ally Donald Trump will "totally destroy the whole world".
"If Trump thinks that he would bring the DPRK, a nuclear power, to its knees through nuclear war threat, it will be a big miscalculation and an expression of ignorance," the letter, published by the Sydney Morning Herald, said.
"Trump threatened to totally destroy the DPRK... it is an extreme act of threatening to totally destroy the whole world."
A spokeswoman for Australia’s Foreign Minister told Reuters the Herald report was accurate and the paper’s copy of the letter, dated September 28, was genuine.
Titled 'Open Letter to Parliaments of Different Countries', the note said it was sent from North Korea’s Embassy in Jakarta, Indonesia, to Australia’s Embassy in the same city, as well as to other countries, without naming them.
There are fears Kim Jong-un is preparing to authorise a fresh missile test 
DPRK stands for the Democratic People’s Republic of Korea, North Korea’s official name.
Tension has soared on the peninsula following a series of weapons tests by North Korea and a string of increasingly bellicose exchanges between Trump and North Korean leader Kim Jong Un.
Trump, in a speech last month at the United Nations, threatened to "totally destroy" North Korea if necessary to defend itself and allies and called the North’s leader Kim Jong Un a "rocket man" on a suicide mission.
The letter calls for "countries loving independence, peace and justice" to discharge their duty and keep "sharp vigilance against the heinous and reckless moves of the Trump administration trying to drive the world into a horrible nuclear disaster."
At a press conference in Sydney, Australian Foreign Minister Julie Bishop said the note was an “unprecedented” communication.
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Donald Trump 
Australian Foreign Minister Julie Bishop
Australian Foreign Minister Julie Bishop 
"It is not the way they usually publish their global messages," she said.
"The collective strategy of imposing maximum diplomatic and economic pressure through sanctions on North Korea is working.
"This is a response to the pressure.”
It comes after North Korea warned the United States it faces an "unimaginable" military strike earlier this week.
The Kim Jong-un regime was reacting to the continued drills being carried out by the US and South Korea in the region.
Next week the allies will carry out Courageous Channel in which Americans in the area will practice being evacuated in the event of a "crisis".
Although it is carried out twice a year, it has heightened fears of military conflict.
North Korea's state news agency said in a statement: "The US is running amok by introducing under our nose the targets we have set as primary ones.
"The US should expect that it would face unimaginable strike at an unimaginable time."
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Last week, North Korea was spotted moving multiple missiles sparking fears of a fresh launch.
A US spy satellite captured images of missiles mounted on launchers being moved out of a hangar near the capital Pyongyang, it was claimed.
American and South Korean intelligence agencies are now preparing for the Kim Jong-un regime to carry out a new provocation in defiance of worldwide condemnation.
It had been expected the most likely date for a new missile launch would be October 10, the anniversary of Kim's political party.
But that date passed without any notable military movements.
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However the new satellite images suggest Kim will go ahead with another test of its intercontinental ballistic missiles.
A source told South Korean newspaper The Dong-A Ilbo: "The North may carry out a simultaneous launch of ICBM and IRBM within a few days in protest against the U.S.'s show of military might."
The US and her ally South Korea have carried out a series of military drills recently.
Two US Air Force supersonic heavy bombers were flown over the Korean peninsula , despite threats from North Korea to shoot down American planes.
Two B-1B Lancers based in Guam flew a mission in the vicinity of the Sea of Japan, staging the first night-time joint aviation exercises with Japan and South Korea.
In response, Kim Jong-un ’s government warned the joint exercise had ‘hardened our determination that the U.S. should be tamed with fire’.
The government said the military drills ‘lets us take our hand closer to the trigger for taking the toughest countermeasure’.
In August, North Korea threatened to fire a salvo of intermediate range missiles toward the U.S. Pacific island territory.
Guam is a major military hub and home to U.S. bombers that periodically fly missions over the divided Korean Peninsula.
Yesterday, White House Chief of Staff John Kelly said there’s ‘great concern’ about Americans who live in Guam.
Speaking at a White House news conference he said: “Right now we think the threat is manageable. Let’s hope that diplomacy works.”
The fresh threat was published in North Korean state media.
It also said that North Korea has ‘already warned several times that we will take counteractions for self-defence including a salvo of missiles into waters near the US territory of Guam’.
It is unlikely to have any effect on next week’s planned major joint-navy drill between Sourth Korea and the U.S.
In a statement the US 7th Fleet said the USS Ronald Regan aircraft carrier and two US destroyers would take part in the drill alongside South Korean Navy vessels.