US president Donald Trump has threatened to impose an additional 10 per cent tariff on any nation aligning themselves with the “Anti-American policies” of the Brics group of developing countries as their leaders met in Brazil on Sunday.

The president said the levy will apply to "any country aligning themselves with the Anti-American policies of Brics".

President Donald Trump threatened to impose an additional 10% tariff on countries that he said support "anti-American" policies of the BRICS group of emerging economies.