Bitcoin worth millions stolen days before US exchange opens

TOKYO (AP) — A bitcoin mining company in Slovenia has been hacked for the possible theft of tens of millions of dollars, just days before the virtual currency, which hit a record above $15,000 on Thursday, is due to start trading on major U.S. exchanges.

NiceHash, a company that mines bitcoins on behalf of customers, said it is investigating a security breach and will stop operating for 24 hours while it verifies how many bitcoins were taken.

Research company Coindesk said that a wallet address referred to by NiceHash users indicates that about 4,700 bitcoins had been stolen. At Thursday's record price of about $15,000, that puts the value at over $70 million.