President Donald Trump announced an additional 25% tariff on India as punishment for importing Russian oil, according to a document posted on the White House website — an escalation of his trade battle with New Delhi and his first use of so-called secondary sanctions on countries the US says are fueling Moscow’s war machine.

India, which now faces among the highest tariff rates imposed by the US, called the levy "unjustified and unreasonable".

A 50% tariff rate will be the highest levy among any U.S. trading partner, with some sectors of Indian economy more exposed than others.