A forensic investigation is underway at the University of Delaware following a recent cyber attack that compromised the personal information of some 72,000 students and employees, according to philly.com.

Confidential files containing personal information, such as Social Security numbers, addresses and school ID numbers, of past and current employees, including student employees were comprised during the attack.

Officials have sent out letters to those whose files were hacked, and the campus is offering free credit monitoring as well. Those concerned can also see if their files were attacked by accessing IT Security Verification application on a special IT Security Response website.

University of Delaware officials said the breach occurred when cyber criminals attacked vulnerability in software provided by a vendor for one of the university’s systems. The campus is currently working closely with the Federal Bureau of Investigation officials and Mandiant, a computer security firm, over the issue.

The university will continue using the IT Security Response website to provide additional information.

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