Suisun City Declares Emergency After Cyberattack

Suisun City, California, declared a state of emergency after a cyberattack disrupted key municipal systems, including 911 call routing, police and fire dispatch, official records and other city services. Local officials disconnected the entire computer network to contain the incident and protect the investigation.

What did the City Council decide?

The City Council formalized the move in a special meeting held Saturday morning and said the cybersecurity incident forced the city to shut down its entire IT network. According to the official statement, the attack affected critical public safety operations, though emergency services remained active and no immediate threat to the public was reported.

How broad was the operational impact?

Available coverage indicates the impact reached emergency dispatch, records and other municipal services. KCRA also reported that, after the network shutdown, the city’s online services and some internal operations were temporarily unavailable.

Telemundo Bay Area added that the city was preserving evidence for a federal investigation and that dispatchers were taking calls through Solano County’s dispatch center, while Suisun City police and fire crews continued responding to calls.

What is the status of the investigation?

The city said it is working with federal, state and regional agencies, including the FBI, the Department of Homeland Security and California OES, to investigate what happened and restore systems. For now, secondary coverage says authorities were still investigating the origin of the attack and had not determined which group may have been behind it or whether personal or corporate data was taken. That information has not been officially confirmed in the material available.

The public documentation cited so far confirms the operational impact and the containment response, but it does not directly establish that the incident was ransomware or identify an attacker.