Santa Clara University and the FBI are investigating who may have hacked into the university's computer system and changed some undergraduate students' grades.
Officials at the private university in Silicon Valley said Monday that they reviewed tens of thousands of records since 2000 and identified unauthorized grade changes. The grades in question belong to a handful of current undergraduate students and about 60 former undergraduates.
FBI agents were knocking on students doors Monday evening, questioning them about the attack, according to reports.
Some students took to Twitter to report the encounter.
"Weirdest day ever. One of the FBI agents who came to my house broke one of our chairs," tweeted Mark Loiseau, an electrical engineering student at Santa Clara University. "Can't make this s**t up."
University President Michael Engh says the grade changes are attributed to someone gaining illegal access into Santa Clara University's academic record system between June 2010 and July 2011.
Engh says there is no evidence to suggest that other personal information of students, staff or faculty has been compromised.