A cyberattack forced officials in a California city to take its entire computer network offline after critical systems were disrupted, including 911 call routing and police and fire dispatch operations.
Suisun City declared a state of emergency on Saturday, one day after malicious software infiltrated municipal IT systems around 5:45 a.m. Friday.
City leaders moved quickly with an aggressive containment plan.
To prevent the malware from spreading further and to preserve digital evidence for a federal investigation, officials shut down the city’s full network.
Even with major systems offline, Suisun City officials said there is no immediate threat to public safety.
Emergency services remain active in the community, with city dispatchers redirecting calls through the Solano County dispatch center.
Police officers and firefighters are still responding to service calls as the city works around the technology outage.
The breach also affected city records and other local government services, temporarily knocking out online tools and disrupting internal operations.
The Suisun City Council voted unanimously Saturday morning to declare the emergency during an 11 a.m. special meeting.
The declaration, made under Government Code 8630, gives the city faster access to emergency support and allows it to recoup costs connected to the cyberattack.
Officials have also brought in the big guns, working with the FBI, Department of Homeland Security, California Office of Emergency Services and other state and regional agencies.
The city has activated its Emergency Operations Center as investigators work to figure out how the malicious software got inside the network and who was behind it.
So far, officials have not revealed how the breach occurred or identified a suspect.
Suisun City, in Solano County, is located about 45 miles from both San Francisco and Sacramento.
For cybersecurity updates, please visit Suisun.com/CybersecurityUpdates.
