The U.S. Treasury Department on Monday imposed sanctions on seven individuals and a money-services business that the agency said helped move money for Islamic State.

The action comes less than a month after U.S.-backed forces captured the last territory controlled by Islamic State in Syria, marking the demise of the group’s so-called caliphate.

The Treasury’s Office of Foreign Assets Control targeted six members of the Rawi Network, a financial organization based in Iraq that the department says helped Islamic State facilitate transactions across Europe, Africa and the Middle East.

The network was used by former Iraqi President Saddam Hussein in the early 1990s to evade sanctions and later supported Islamic State by smuggling cash and using other techniques to launder money, the Treasury Department said.

Read more: Wall Street Journal