The United States on Tuesday imposed new North Korea-related sanctions, targeting Chinese and Russian firms and individuals for supporting Pyongyang's weapons programs, but stopped short of an anticipated focus on Chinese banks.

The US Treasury designated six Chinese-owned entities, one Russian, one North Korean and two based in Singapore. They included a Namibia-based subsidiary of a Chinese company and a North Korean entity operating in Namibia.

The sanctions also targeted six individuals - four Russians, one Chinese and one North Korean.

North Korea
North Korean leader Kim Jong-Un smiles during a visit to the Chemical Material Institute of the Academy of Defense Science in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on August 23, 2017.Reuters

The move follows toughened United Nations sanctions agreed this month after North Korea tested its first two intercontinental ballistic missiles in July.

China reacted with irritation, saying Washington should "immediately correct its mistake" of imposing unilateral sanctions on Chinese companies and individuals to avoid damaging bilateral cooperation.

The Russian embassy did not respond to a request for comment.