US President Donald Trump has warned that countries which side with the policies of the BRICS alliance that go against US interests will be hit with an extra 10% tariff.

Axar.az informs, citing BBC, "Any country aligning themselves with the Anti-American policies of BRICS, will be charged an ADDITIONAL 10% tariff. There will be no exceptions to this policy," Trump wrote on social media.

Trump has long criticised BRICS, an organisation whose members include China, Russia and India.

The US had set a 9 July deadline for countries to agree a trade deal, but US officials now say tariffs will begin on 1 August. Trump said he would send letters to countries telling them what the tariff rate will be if an agreement is not reached.