US President Donald Trump has threatened to impose an additional 10 per cent tariff on countries aligning themselves with the "anti-American" policies of the BRICS grouping.

His comments came after the BRICS bloc condemned the increase of tariffs without naming Trump. Leaders of the BRICS are meeting in Brazil for the 17th BRICS Summit on July 6-7.

"Any Country aligning themselves with the Anti-American policies of BRICS, will be charged an ADDITIONAL 10 per cent Tariff. There will be no exceptions to this policy. Thank you for your attention to this matter!" Trump said in a post on Truth Social on Sunday night.