By Siddhi Nayak, Sarita Chaganti Singh and Nikunj Ohri MUMBAI/NEW DELHI (Reuters) - Indian lenders, including State Bank of India, are reviewing their exposure to Adani Group and examining whether they need to tighten their due diligence when offering new loans to them,

Hundreds of supporters of India’s main opposition party have protested against billionaire Gautam Adani, who was recently indicted in the U.S. for alleged fraud and bribery, and accused the government of protecting the Indian coal magnate whose companies’ shares have plunged since the charges last week.

Some nations and investors have either scrapped deals or halted investments in the Adani Group, after the United States indicted its billionaire chairman Gautam Adani for alleged bribery and fraud to win contracts for a group company,