The Justice Department on Tuesday said it has seized infrastructure tied to what officials called one of the world’s most prolific criminal marketplaces, used to commit cyber scams and other crimes.

The seized cloud computing account hosted backend infrastructure used by subsidiaries of the Huione Group, a Cambodia-based corporate conglomerate.

At the same time, the Treasury Department announced fresh sanctions and more against Huione and affiliated companies. The administration actions Tuesday add to disruption efforts from last fall against pieces of the same network.

The Trump administration has placed an emphasis on combating transnational cybercrime and other kinds of scams and fraud.

The seized cloud computing account was used to operate Huione Guarantee, also known as Haowang Guarantee, according to Tuesday’s DOJ announcement.

“The Huione Group used this cloud computing account as part of a technological backbone that allowed billions in fraud proceeds to be transferred, moved, and concealed — much of it stolen through Southeast Asian scam centers,” said Tysen Duva, assistant attorney general of the Justice Department’s Criminal Division. “Seizures of these marketplaces is critical in the fight against fraud that affects so many Americans, and to stop avenues for criminal proceeds to be laundered.”

U.S. officials allege that Huione Guarantee operated Telegram channels with discussions about illicit goods and services, including the sale of stolen credit card and sensitive personal information, malware-enabled thefts, human trafficking schemes and the laundering of money from romance and investment scams. Huione Guarantee also allegedly offered escrow services for criminals such as money launderers for cryptocurrency.

Treasury took two steps Tuesday to build on its move in October to sever Huione Group from the U.S. financial system. One was to tack H-Pay Service onto its rule for Huione Group as a successor entity. And it slapped nine people and 26 entities linked to Prince Group with sanctions.

“Huione Group served as a critical node for laundering proceeds of cyber heists and virtual currency investment scams and was used by the Prince Group to transfer and consolidate scam-derived assets,” Treasury’s announcement states.

Also last October, the Justice Department said it seized bitcoin valued at $15 billion from the chairman of the Prince Group, Chen Zhi, and indicted him over alleged cryptocurrency crimes and other schemes. 

An alleged key figure in Chen’s criminal network has been arrested in Cambodia and extradited to China.