Binance, the world’s largest cryptocurrency exchange, has suspended withdrawals after hackers broke into its digital wallets and stole $6 billion in what appears to be the biggest crypto heist ever.

The exchange said Friday that it has begun recovering affected assets and was continuing to work with law enforcement and blockchain intelligence firms to trace additional funds.

An initial investigation suggested the hack went through an engineer’s laptop, “which allowed an attacker to gain access to a service container and submit unauthorized withdrawal transactions,” Binance said late on Thursday. Blockchain evidence suggests the…