Chinese hackers infiltrated the network of at least one state's National Guard and remained in its systems for over nine months, a Department of Homeland Security memo says. The findings, as first reported by NBC News,

Chinese hackers stole network diagrams, credentials, and personnel data in a breach that poses a threat to critical infrastructure nationwide.

China faces scrutiny over cyber espionage. A US state's Army National Guard network suffered a breach. The group Salt Typhoon is suspected. Maps and data were stolen. The breach occurred between March and December 2024.