STATE COLLEGE, Pa. - Pennsylvania State University says the Social Security numbers of nearly 30,000 individuals may have been exposed because of a privacy breach caused by infected university computers.

A school spokeswoman said yesterday that there was no evidence the information had been accessed by unauthorized parties, but that the university was being cautious in notifying people their information was on an infected computer.

The school announced Dec. 23 that the computers had been hit by "malware," or malicious software. - AP