SACRAMENTO, Calif. (KERO) — The state Department of Motor Vehicles says a contractor it uses to verify vehicle registration addresses was the victim of a ransomware attack early this month.

According to our San Diego affiliate, the attack may have compromised the last 20 months of California vehicle registration records that contain names, addresses, license plate numbers, and vehicle identification numbers.

The DMV says the hack did not involve social security numbers, birthdays, voter registration, immigration status or driver's license information.

Data transfers have been stopped and an investigation has been launched to see whether the information is being used in any way.