(BBC News) A man who ran an online "wallet service" for storing Bitcoins has claimed hackers stole virtual currency from his site worth more than one million Australian dollars.
The Australian man said 4,100 Bitcoins (US$1.04m, £650,000) were taken in two separate attacks.
He said he would not report the theft to police as Bitcoin transactions are virtually impossible to trace.
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This has led some users to speculate whether it was an "inside job".