http://www.bbc.co.uk/news/technology-43291026A UK company has been linked to the laundering of 650,000 stolen bitcoins worth £4.5bn, a BBC Radio 4 investigation has found.
The coins were taken by hackers from Tokyo-based Bitcoin exchange Mt Gox, leaving tens of thousands of customers out of pocket.
It's not clear who is in control of the London-based firm Always Efficient LLP.
Always Efficient's registered office is in east London, but the address is shared by several other firms, some of which are thought to be involved in money laundering.
Duncan Hames, of anti-corruption group Transparency International, said it's likely to be a shell company.
Mt Gox operator Mark Karpeles apologised to investors and said he was co-operating with the investigation.
The FBI has charged a Russian national with laundering the stolen bitcoins.
Looks like the company is registered in Britain and they are now trying to find out who owns it.
