North Korean leader Kim Jong Un vowed to redouble efforts to make his nuclear force fully ready for combat with the United States and its allies, state media reported Tuesday.

The country disclosed a new platform likely designed to fire more powerful intercontinental ballistic missiles targeting the mainland US.

Kim has repeatedly made similar pledges, but his latest threat comes as outside experts believe Kim will perform provocative weapons tests ahead of the U.S. presidential election in November. In recent days, North Korea has also resumed launches of trash-carrying balloons toward South Korea.

In a speech marking the 76th founding anniversary for his government on Monday, Kim said North Korea faces ‘a grave threat’ because of what he called ‘the reckless expansion’ of a US-led regional military bloc that is now developing into a nuclear-based one. Kim said such a development is pushing North Korea to boost its military capability, according to the official Korean Central News Agency.

Kim said North Korea will “redouble its measures and efforts to make all the armed forces of the state including the nuclear force fully ready for combat,” KCNA said.

North Korea has been protesting the July signing of a new US-South Korean defense guideline meant to integrate US nuclear weapons and South Korean conventional weapons to cope with growing North Korean nuclear threats. North Korea said the guideline revealed its adversaries’ plots to invade the country. U.S. and South Korean officials have repeatedly said they don't intend to attack the country.

Since 2022, North Korea has significantly accelerated its weapons testing activities in a bid to perfect its capabilities to launch strikes on the US and South Korea. The U.S. and South Korea have responded by expanding military drills that North Korea calls invasion rehearsals.