The United Nations Security Council has unanimously stepped up sanctions against North Korea.
The resolution was imposed on Monday over the rogue nation's sixth and most powerful nuclear test on September 3, imposing a ban on the country's textile exports and capping imports of crude oil.
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It was the ninth sanctions resolution unanimously adopted by the 15-member council since 2006 over North Korea's ballistic missile and nuclear programs.
The US watered down an initial tougher draft resolution to win the support of Pyongyang ally China and Russia.
Textiles were North Korea's second-biggest export after coal and other minerals in 2016, totalling $US752 million, according to data from the Korea Trade-Investment Promotion Agency. Nearly 80 per cent of the textile exports went to China.
The resolution imposes a ban on condensates and natural gas liquids, a cap of two million barrels a year on refined petroleum products, and a cap on crude oil exports to North Korea at current levels. China supplies most of North Korea's crude.
A US official, familiar with the council negotiations and speaking on condition of anonymity, said North Korea imports some 4.5 million barrels of refined petroleum products annually and 4 million barrels of crude oil.