Cryptocurrency exchange Gemini, owned by the Winklevoss brothers, has informed customers that it will henceforth stop working with brokerage company Genesis, writes Business Insider.

The news comes after Gemini co-founder Cameron Winklevoss on Tuesday accused Genesis, parent company DCG and its founder Barry Silbert of fraud.

“This officially terminates the Earn program and requires Genesis to return all assets in circulation under the program,” Gemini said in an email.

Genesis’ lending division suspended customer withdrawals in November, leaving $900 million of Gemini’s customer money at risk. The cryptocurrency conglomerate Digital Currency Group’s lending business faced a lack of liquidity due to the impact of the FTX crash and increased withdrawal requests.

The decision to pull out comes amid a public dispute between the cryptocurrency firm’s executives over allegations of unfair business tactics and claims that DCG owes Gemini customers nearly $1 billion.

In an open letter to DCG’s board on Tuesday, Gemini co-founder Cameron Winklevoss accused Genesis, DCG and holding company founder Barry Silbert of fraud and called on him to step down as DCG CEO immediately.