India's foreign ministry said on Friday that bribery allegations against billionaire Gautam Adani by U.S. authorities is a legal matter between private firms and the U.S. Department of Justice and that New Delhi is not involved in the case at this point.

Adani, 62, one of Asia’s richest men, was thrust into the spotlight last week when U.S. prosecutors in New York charged him and seven of his associates with securities fraud.

Congress and other opposition parties accuse the government of Prime Minister Narendra Modi of protecting billionaire Gautam Adani.