School officials in Concord say the school district was the victim of a cyber attack that compromised the personal information of all employees with 2015 W-2 tax forms on file.
The superintendent's office says the discovery was made on June 1; the data breach itself happened on April 7.
WMUR-TV reports investigators said employees' personal information was obtained, including their addresses and Social Security numbers, as well as additional tax and contribution funds information. Network and email systems were not compromised.
Superintendent Terri Forsten on Tuesday recommended that employees contact their banks and other asset institutions and register for fraud alerts. School officials also offered free credit monitoring services.
