The US government has seized more than $14bn (£10.5bn) in bitcoin and charged the founder of a Cambodian business empire, Prince Group, with allegedly masterminding a massive cryptocurrency scam.
UK and Cambodian national Chen Zhi was charged on Tuesday in New York for allegedly engaging in a wire-fraud conspiracy and running a money laundering scheme.
Mr Chen's businesses were also sanctioned by the US and the UK as part of a joint operation. The UK government says it has frozen assets owned by his network, including 19 properties in London - one of which is worth nearly £100m ($133m).
The BBC has contacted the Prince Group for comment.
US prosecutors say it is one the biggest financial takedowns in history and the largest ever seizure of bitcoin, with approximately 127,271 bitcoin being held by US government.
