Chinese government hackers targeted the U.S. Treasury’s highly sensitive sanctions office during a December cyberattack, according to reports. According

Chinese hackers who launched a cyberattack on the US Treasury Department targeted an important department of the agency that deals with sanctions against countries and groups of people imposed by the US government.

The Treasury Department says Chinese hackers remotely accessed several employee workstations and unclassified documents after compromising a third-party software service provider.