Mark Karpeles, chief executive of Mt. Gox, the embattled Toyko-based bitcoin exchange, resigned on Sunday from the board of the Bitcoin Foundation, in the latest blow to the digital currency.
Jinyoung Lee Englund, a spokesperson for the Bitcoin Foundation—a trade group promoting the adoption of the digital currency, confirmed the news and said the resignation was effective immediately.
The resignation follows a number of technical issues, including a massive cyber attack from unknown sources that has been spamming bitcoin exchanges.
(Read more: How can you make money with bitcoin?)
Earlier in February, Mt. Gox, the best-known digital marketplace operator, said it is halting withdrawals indefinitely after it detected "unusual activity.