North Korea held a policymaking politburo meeting of the ruling Workers' Party presided over by leader Kim Jong-un and decided to consider restarting "all temporally-suspended" activities, Pyongyang's state media reported Thursday, apparently referring to its nuclear and intercontinental ballistic missile (ICBM) tests.

The meeting took place after the North conducted four missile tests this month alone, including two of what it claims to be a hypersonic missile, prompting the United States to slap new sanctions on the regime. The US is leading a campaign within the UN Security Council to extend its own sanctions, with a closed-door council meeting on the issue scheduled to be held Thursday.

During the session held the previous day, the participants vowed preparations for a "long-term confrontation" with the US, saying the "hostile policy and military threat by the US have reached a danger line that can not be overlooked any more," according to the North's official Korean Central News Agency (KCNA).

"It gave an instruction to a sector concerned to reconsider in an overall scale the trust-building measures that we took on our own initiative on a preferential ground and to promptly examine the issue of restarting all temporally-suspended activities," the KCNA said.

North Korea has maintained a self-imposed moratorium on nuclear and ICBM testing since late 2017.

"The meeting of the Political Bureau reassigned the policy tasks for the national defense of immediately bolstering more powerful physical means which can efficiently control the hostile moves of the US against the DPRK getting ever more serious day by day," it said. DPRK stand for the North's official name, the Democratic People's Republic of Korea.

The North said, "Especially the present US administration persists in maneuvers to deprive the DPRK of its right to self-defense."

"In the last few years alone after the DPRK-US summit meetings, the US held hundreds of joint war drills ... while shipping ultra-modern attack means into South Korea and nuclear strategic weapons into the region around the Korean peninsula, seriously threatening the security of our state," the KCNA said.

Last week, the Joe Biden administration announced fresh sanctions on six North Koreans involved in the regime's weapons of mass destruction and ballistic missile programs. (Yonhap)