Mumbai, Aug 7 (PTI) Benchmark equity indices Sensex and Nifty declined in early trade on Thursday as US President Donald Trump slapped an additional 25 per cent duty -- doubling it to 50 per cent -- on Indian goods over New Delhi's continued imports of Russian oil.

The move that is likely to hit sectors such as textiles, marine and leather exports hard was slammed by India as "unfair, unjustified and unreasonable". With this action singling out New Delhi for the Russian oil imports, India will attract the highest US tariff of 50 per cent along with Brazil.

The 30-share BSE Sensex dropped 335.71 points to 80,208.28 in early trade. The 50-share NSE Nifty declined 114.15 points to 24,460.05.

From the Sensex firms, Adani Ports, Tata Motors, Kotak Mahindra Bank, Eternal, Tata Steel and NTPC were among the laggards.

However, Trent, Titan, Sun Pharma and ITC were among the gainers.

In Asian markets, South Korea's Kospi, Japan's Nikkei 225 index, Shanghai's SSE Composite index and Hong Kong's Hang Seng quoted in positive territory.

The US markets ended higher on Wednesday.

Foreign Institutional Investors (FIIs) offloaded equities worth Rs 4,999.10 crore on Wednesday, according to exchange data.

Global oil benchmark Brent crude jumped 1 per cent to USD 67.56 a barrel.

On Wednesday, the 30-share BSE Sensex fell 166.26 points or 0.21 per cent to settle at 80,543.99. The Nifty dipped 75.35 points or 0.31 per cent to close at 24,574.20. PTI SUM DRR

Additional US tariff on Indian imports over Russian oil imports pressures export sectors and rattles markets. The United States imposed an additional tariff on Indian imports in response to India's continued purchases of Russian oil, doubling prior duties and singling out India for the highest applied tariff rate. The measure functions as a trade-restrictive instrument tied to energy-related import choices and is expected to hit export-oriented sectors such as textiles, marine and leather, producing adverse market reactions and increased compliance and cost burdens for affected exporters.