A theft over the weekend of nearly $300 million worth of cryptocurrency has been attributed to hackers from North Korea, as the industry grapples with the fallout of a wide-ranging incident involving multiple prominent platforms. 

The attack began on Saturday afternoon when blockchain security firms reported $290 million leaving the crypto platform Kelp. The company confirmed the incident and paused activity while an investigation was conducted. 

Cyber sleuths traced the incident back to LayerZero, a cryptocurrency infrastructure developer behind a popular messaging tool allowing decentralized apps to communicate and transfer assets back and forth. 

Early on Monday, LayerZero published a lengthy post-mortem explaining that…