India, Aug. 4 -- Indian shares may open on a weak note Tuesday after U.S. President Donald Trump threatened to "substantially" raise tariffs on goods imported from India, accusing that the country profited from Russia's war in Ukraine by purchasing large quantities of Russian oil and reselling it on the global market.

The Ministry of External Affairs has said that it is unjustified and unreasonable for India to be targeted by the United States and the European Union.

In a statement, the Ministry asserted that India would take all necessary measures to safeguard its national interests and economic security.

Markets may also see some volatility on the eve of the first weekly expiry of the Sensex contracts for the August series and upcoming...