TAMPA, Fla. — The Hillsborough County Supervisor of Elections office is sending out letters this week to notify residents some of their personal information may have been accessed.

The office says about 58,000 people were impacted during a data breach in May.

Information such as social security and driver’s license numbers were copied, according to an investigation.

The breached files were mainly used for voter registration list maintenance.

Supervisor of Elections Craig Latimer said someone was able to access files on a shared drive in the election office’s network. Local, state and federal law enforcement was notified and is investigating.

Latimer stressed that voter registration and ballot systems were not impacted.