The North Korean foreign ministry has warned that a war on the Korean peninsula is "now an established fact", adding: "the remaining question now is when will the war break out?".
KCNA, a state news wire, said a spokesman for the country's Ministry of Foreign Affairs accused the US government of "confrontational warmongering remarks", and said the director of the CIA had made a "provocation" by "impudently criticising our supreme leadership".
"The large-scale nuclear war exercises conducted by the US in succession are creating touch-and-go situation on the Korean peninsula and series of violent war remarks coming from the US high-level politicians amid such circumstances have made an outbreak of war on the Korean peninsula an established fact," he said.
"The remaining question now is: when will the war break out?"
He added that North Korea "do not wish for a war, but shall not hide from it".
"Should the US miscalculate our patience and light the fuse for a nuclear war, we will surely make the US dearly pay the consequences with our mighty nuclear force which we have consistently strengthened."
The threats come days after research from Goldman Sachs suggested apocalyptic threats from North Korea have little effect on markets.
The study suggested tweets from Donald Trump were far more likely to agitate traders, with the Chicago Board of Options' Volatility Index (Vix) far more likely to peak after Trump tweeted about military activity than after Kim Jong Un threatened all-out war.