"We have always believed that military means should not be an option to resolve the nuclear issue on the peninsula".
White House spokeswoman Sarah Sanders said it was "absurd" to suggest the U.S. had declared war.
The DPRK foreign minister also said that the DPRK reserved the right to take countermeasures, including shooting down United States bombers even if they are not in its air space. "So we'll see what happens with North Korea".
The eight banks are all in North Korea. He's saying things that should "never, ever" be said, alleged the US President.
The back and forth between Trump and the North Korean government this week continues a months-long war of words between the two countries that has seen North Korea threaten the USA territory of Guam and the nation's leader, Kim Jong Un, call Trump a "dotard" who exhibits "mentally deranged behavior".
Ri also vowed that Pyongyang would fire at any USA aircraft near the country, even in global airspace.
His comments come after the USA sent bomber jets to South Korea over the weekend as tensions between the USA and North Korea continue to worsen.
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Yong Ho said that this could apply even if the warplanes were not in Pyongyang's airspace.
Dunford said Pyongyang will have a nuclear-capable intercontinental ballistic missile "soon", and it was only a matter of a "very short time".
China, North Korea's main ally, would likely be extremely unhappy if Pyongyang tested a missile or carried out some other act during its Communist Party Congress, held once every five years.
Diplomats have played down the risk of direct conflict but it is no thanks to President Trump who time and again has fallen short of the standards expected for such an important job.
In response, DPRK's top leader Kim Jong Un vowed to retaliate, saying Trump "will face results beyond his expectation".
Tensions on the Korean peninsula have escalated in recent weeks as North Korea's leader Kim Jong Un and US President Donald Trump exchanged bellicose threats and insults over the North's nuclear and missile development programme. Last week's executive order will penalize any company or person doing business with North Korea by either cutting off their access to the USA financial system or freezing their assets - or potentially both.