A computer system at Antioch University that contained personal information on about 70,000 people was breached by an unauthorized intruder three times last year, the school said Friday.

The university said there is no conclusive evidence that any personal information was stolen, but law enforcement officials are investigating.

The system contains names, Social Security numbers, academic records and payroll documents for current and former students, applicants and employees going back to 1996.

Antioch University has campuses in Yellow Springs, Ohio; Seattle; Los Angeles and Santa Barbara, Calif.; and Keene, N.H.

The breaches occurred on June 9, June 10 and Oct. 11.