By Bharath Rajeswaran and Vivek Kumar M (Reuters) -Indian shares declined on Tuesday as investors stayed cautious after U.S. President Donald Trump's renewed threat of harsh tariffs on goods from India over the country's purchases of Russian oil and ahead of the local central bank policy decision.

U.S. President Donald Trump said on Monday he willsubstantially raise tariffs on India over its purchases of Russian oil. "India is not only buying massive amounts of Russian Oil, they are then, for much of the Oil purchased,