A senior official of the regulators told the Wall Street Journal that the U.S. Securities and Exchange Commission SEC is tightening the scrutiny of the work audit firms do for cryptocurrencies companies.
Paul Munter, SEC's acting chief accountant, said investors are warned to be very cautious about some of the claims made by criptocurrency companies.
The implosion of FTX has rippled across the industry, hobbling liquidity at firms with exposure to one of the world's biggest cripto exchanges, and has prompted investigations by regulators in several countries.
Last month FTX filed for U.S. bankruptcy protection and its founder Sam Bankman- Fried resigned as chief executive after rival exchange Binance walked away from a proposed acquisition.
Several firms have been bracing for a fallout from the FTX collapse, with many counting their exposure in millions to the beleaguered exchange.