China’s cybersecurity agency accused the American government of orchestrating the theft about $13 billion worth of Bitcoin, representing China’s most recent attempt to attribute major cyberattacks to the US.

The theft of the 127,272 Bitcoin tokens from the LuBian Bitcoin mining pool that took place in December 2020 marks as one of the largest crypto heists in history. The hack, according to the Chinese National Computer Virus Emergency Response Center, is likely a “state-level hacker operation” led by US, citing the quiet and delayed movement of the stolen Bitcoin fits a government-level action rather than a typical criminal behavior.