The Trump administration has been accused of "begging for nuclear war" by North Korean state news.
North Korea's accusation comes as the United States and South Korea launch their largest-ever joint air force drills.
The annual drill, called Vigilant Ace, saw six F-22 Raptor stealth fighters deployed to South Korea as well as F-35 fighters. In total 230 aircraft will be involved in the five-day drill.
According to a South-Korea based US Air Force spokesman, the joint exercises will include the largest number of fifth-generation fighters to take part.
Around 12,000 US service members, including those from the Marines and Navy, will join South Korean troops.
The exercises have been condemned by North Korea as a deliberate provocation.
The North's KCNA news agency reacted to the U.S-South Korean aerial exercises by stating the US was staging an "extremely dangerous nuclear gamble on the Korean peninsula".
The purpose of the joint drill is to enhance readiness and operational capability. The US military also said before starting the drill that it is to ensure peace and security in the Korean peninsula.
The drills come a week after North Korea said it had tested its most advanced intercontinental ballistic missile ever, in defiance of international sanctions and condemnation.
State media in the North has blamed President Donald Trump for raising tensions and warned the Vigilant Ace exercise would lead towards a "flare-up" on the Korean peninsula.
North Korea's Committee for the Peaceful Reunification of the Country called the U.S President 'insane', as the drill would "push the already acute situation on the Korean peninsula to the brink of nuclear war".