A Department of Defense (DOD) report found that the hacking group, known as Salt Typhoon, had “extensively compromised a U.S. state’s Army National Guard network” from March 2024 through December, the June 11 memo revealed, obtained by NBC News.

A Department of Homeland Security memo from June, describing the Pentagon’s findings, said that the group, publicly known by the nickname Salt Typhoon, “extensively compromised a U.S. state’s Army National Guard network” from March 2024 through December 2024. The memo did not specify which state was affected.