Gautam Adani, the billionaire chairman of India’s Adani Group, has been indicted in New York over his alleged involvement in a vast bribery and fraud scheme, U.S. prosecutors announced on Wednesday. Adani, along with seven co-defendants, including his nephew Sagar Adani, is accused of paying around $265 million in bribes to Indian government officials. The bribes were intended to secure contracts that would generate an estimated $2 billion in profits over the next 20 years, including the development of India’s largest solar power plant.

Prosecutors further claim that Adani, his nephew, and former Adani Green Energy CEO Vneet Jaain concealed their corrupt activities to raise over $3 billion in loans and bonds, deceiving both investors and lenders.

The indictment revealed that some co-conspirators referred to Gautam Adani using code names such as “Numero uno” and “the big man,” while Sagar Adani allegedly used his cellphone to track the details of the bribery scheme.

Adani Group has not yet responded to the charges outside business hours in India, where the news broke early Thursday morning. India’s embassy in Washington has also not commented. The defendants’ legal representatives have not been identified.