UC Berkeley officials say that about 1,600 people may have had their Social Security or credit card numbers stolen by hackers who infiltrated campus servers and databases.
University spokeswoman Janet Gilmore says many of the individuals potentially affected by the data breach in the school's real estate division are current or former UC Berkeley employees, while others had business ties to the division.
The break-in was discovered in September, but Gilmore says it took until the middle of November to determine what personal information the hacked servers stored and to track down addresses for those impacted.
The university started notifying people their information may have been compromised on Monday.
Gilmore says officials do not have any evidence the hackers downloaded or used the information.