Officials said the city isolated the threat, while Leon County cut a network connection as a precaution and warned of possible outages tied to shared applications.
City says missing records, inaccessible systems and wiped devices found after an administrative transition prompted requests for state and federal help.
District officials said an outside actor accessed some systems, prompting a shutdown that canceled classes, child care and after-school programs Monday.
A second county cyber incident this year disrupted critical systems and impaired emergency and municipal services, prompting Gov. Tim Walz to authorize Minnesota National Guard support.
The company said it isolated affected services after a cybersecurity event, disrupting alarm communications for dealers and monitored accounts nationwide.
Gritman says outpatient disruptions began earlier in the week, while the hospital and emergency department remained open and no patient data was compromised.
The district said it is responding to unauthorized activity on its network, but officials have not yet detailed what systems or services were disrupted.