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.

India is a key market for American brands that have rapidly expanded to target a growing base of affluent consumers

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.