By Dhwani Pandya, Shilpa Jamkhandikar and Shivam Patel MUMBAI/NEW DELHI (Reuters) -The finance chief of India's Adani Group on Friday rejected U.S. allegations that executives, including Chairman Gautam Adani,

NEW DELHI -- Asia’s controversial richest man, Indian tycoon Gautam Adani, is again in the spotlight. His companies’ stocks plunged up to 20% on Thursday after he was indicted by U.S. prosecutors on charges he duped investors in a massive solar energy project in India by concealing that it was being facilitated by an alleged bribery scheme.

Even these projects, all part of India’s Adani Group, barely convey the scale of a conglomerate so intertwined with government priorities that it is almost synonymous with Prime Minister Narendra Modi’s India.