HELENA, Mont. (AP) — Montana officials say hackers have had access to the Department of Public Health and Human Services' computer server since July 2013.
The server contains personal information about the agency's clients and employee payroll information, including Social Security numbers and bank account information.
Agency spokesman Jon Ebelt says information technology employees noticed suspicious activity on the server on May 15, and a forensic investigation confirmed it a week later.
The server has been shut down, but Ebelt said Thursday the hackers have had continuous access for nearly a year.
Ebelt says there is no evidence so far that the information contained in the server has been used, but agency officials are assuming the worst.
He says he does not know how many people's names and personal information are in the server.