India is likely to be among the countries worst hit by U.S. President Donald Trump's trade offensive, with tariffs on Indian imports set to surge to 50% if a deal is not struck in three weeks.

US President Donald Trump doubled tariffs on Indian goods to 50% as a penalty for its purchases of Russian oil, escalating a fight with a key Asian partner and sparking outrage in New Delhi.

Trump has now imposed a total of 50% tariffs on goods imported from India, and his earlier threat of levying an extra 10% for the country's membership in the Brics grouping, which includes China, Russia and South Africa as founding members, still stands.