Hackers steal $600 million in cryptocurrency heist — then have second thoughts

An unknown cyberthief or hacker group is returning some of the money after stealing an estimated $611 million from a cryptocurrency exchange in what's being called one of the largest heists of its kind.

The company, called Poly Network, revealed the incident in a tweet late Tuesday. In a separate statement posted on Twitter, Poly Network pleaded with the hacker, or hackers, "to return the hacked assets."  "The amount of money you hacked is the biggest one in the defi [decentralized finance] history," Poly Network said. "The money you stole are from tens of thousands of crypto community members, hence the people."