Trump, who has previously denounced India as a “tariff king”, blamed New Delhi’s purchases of Russian weapons and oil for the additional rate, which puts at risk India’s largest export market, worth $87bn in the year to the end of March.

The Indian prime minister has said his country "is ready" to react to President Donald Trump's additional 25 percent levy on goods entering the U.S.

Indian Prime Minister Narendra Modi said on Thursday he will not compromise the interests of the country's farmers even if he has to pay a heavy price, in his first comments after U.S. President Donald Trump's salvo of a 50% tariff on Indian goods.