Tough new US regulations on the import of goods from the Xinjiang region of China have come into effect.
Under the rules, firms have to prove imports from the region are not produced using forced labour.
US officials have said members of the minority Uyghur community in the region, who are predominantly Muslim, have been detained and made to work.
China has repeatedly rejected accusations that it is holding Uyghurs in internment camps in Xinjiang.
Several imports from the resource-rich region, including cotton and tomatoes, have already been banned from the US.
The restrictions will be extended to all imports under the Uyghur Forced Labor Prevention Act (UFLPA), which took effect on Tuesday.
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