The United Nations Security Council is set to vote on a US-drafted resolution that aims to slash North Korea's $US3 billion ($NZ4.05 billion) annual export revenue by a third.
The resolution comes after Pyongyang's two intercontinental ballistic missile tests in July.
A council diplomat, speaking on condition of anonymity, said there was a "high confidence" that North Korea ally China and Russia would support the draft resolution, which was circulated to the 15 Security Council members on Friday.
The council is due to vote at 3pm (NYÂ time) on Saturday. A resolution needs nine votes in favour, and no vetoes by the United States, China, Russia, France or Britain, to be adopted.
The draft resolution would ban North Korea's exports of coal, iron, iron ore, lead, lead ore and seafood.
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