Norway has seized over $5.8 million (60 million kroner) worth of cryptocurrency that North Korean hackers stole last year, a development an expert described as a good sign that more stolen assets will be recovered soon.

The National Authority for Investigation and Prosecution of Economic and Environmental Crime, also known as Okokrim, said in a press release Thursday that law enforcement recovered the cryptocurrency as part of an ongoing investigation into the Lazarus Group hacking syndicate’s attack on the Vietnam-based company Sky Mavis and its blockchain-based online game Axie Infinity.

The amount recovered is the largest