Binance said it has “uncovered additional points of breach” in an attack in which hackers stole up to $6.3 billion in cryptocurrency.

The crypto exchange initially said the incident may have stemmed from an engineer’s compromised laptop, but in a Friday morning update said further investigation had found the “complex attack” went beyond that.

A Binance spokesperson said that it is working with law enforcement to resolve the attack, which appears to be the largest ever crypto heist. They added that they would share a “detailed technical postmortem once the investigation is complete.”

Major cryptocurrencies were trading lower following the hack, which caps a month full of other high-profile security…