A laptop containing the names and Social Security numbers of around 400 state health department employees is missing.
The Department of Health and Environmental Control says the computer was inside a worker's vehicle when it was stolen last week from a Spartanburg convenience store.
State officials say the password-protected computer contains personal information of state health department workers from Spartanburg, Cherokee, Union, Greenville and Pickens counties.
The agency has notified credit reporting bureaus about the theft.
State officials say there is no evidence that the employees' names or Social Security numbers have been used.