US President Donald Trump on Saturday said that his administration is immediately sending letters to the first batch of 10 to 12 countries, sharing details of reciprocal tariff rates and the entire process could be completed by July 9.

His comments came amid increasing suspense in India on whether New Delhi and Washington would be able to firm up a much-anticipated trade deal before the US president's tariff deadline ends.

"We are going to start sending letters out to various countries starting tomorrow," Trump told reporters at Joint Base Andrews air base in Maryland before departing to Iowa.