Anonymous hackers have published financial data of Mt Gox, revealing that the Bitcoin exchange still has in its possession more than 750,000 virtual currency previously reported as stolen.
The claims from the hackers came after the personal blog of Mt Gox CEO Mark Karpeles was hacked.
Mt Gox had suspended operations and filed for bankruptcy protection in February, claiming that that it had lost about 850,000 bitcoins.
According to PC World, the hackers then posted what they claim is a ledger showing a balance of some 950,000 bitcoins based on records they obtained from the defunct exchange for the virtual currency.
Neither Mark Karpeles nor Mt Gox officials could immediately be reached to verify the claims.
According to the report, Karpeles has maintained a low profile since the filing in Tokyo District Court.
Mt Gox, which went offline, had announced that about 750,000 customer bitcoins it held are missing along with 100,000 of its own bitcoins and 27.3 million dollars in customer deposits, the report said.
The attackers claim to have obtained database records containing transaction details from Mt Gox.
They wrote they purposely withheld users' personal data. Mt. Gox had as many as 1 million customers as of December, the report added.