NEW DELHI (AP) — 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.

New York prosecutors said billionaire Gautam Adani and seven of his execs paid massive bribes to the Indian government and hid them from US investors.

U.S. prosecutors allege that Gautam Adani, the second most-wealthy Indian man, personally met with Indian government officials to further their "bribery scheme."