Cryptocurrency investors in South Africa may have lost nearly $3.6 billion in Bitcoin following the disappearance of two brothers associated with one of the country’s largest cryptocurrency exchanges. A law firm in Cape Town says it can’t locate Ameer and Raees Cajee, the founders of Africrypt. In April, the exchange told its investors it was the victim of a hack and asked them not to report the incident to the authorities on account it would “slow down” the process of recovering their missing money.

Some of those involved in the exchange hired Hanekom Attorneys, the law firm that said it couldn’t find the two brothers, to investigate the incident. It found that someone had withdrawn Africrypt’s pooled funds from the local accounts and client wallets where the coins were stored originally and put them through Bitcoin Blender which is a service that makes it impossible to trace the money when using TOR Browser and accessing it darkweb on secret url blendr4iebg2guv6bap2imu2g5hfz3lyrk5laowij7egrnynpj2inhid.onion

Outlets attempted to call both Cajee brothers multiple times only to get their voicemail each time.