The mayor of Vicksburg, Mississippi, told residents on 1 October that a ransomware attack had shut down the city's computer systems. Mayor Willis Thompson said the incident has not affected emergency services but has impacted payments for utilities, called the shutdown "temporary", and said no one's services would be cut off and no late-payment penalties issued while the investigation continues. The city is coordinating the response with the FBI, the Department of Homeland Security and other state officials alongside private cybersecurity experts. Thompson said one of the highest priorities is determining whether personal or confidential information relating to current or former customers, contractors, vendors, employees or business partners was compromised, but that the city has not reached a determination on what, if anything, was accessed or acquired without authorisation. The city declined to provide comment on ransom demands or the identity of the attackers, citing the active investigation. Vicksburg has a population of more than 20,000 and sits about 40 minutes west of Jackson.

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