STATE COLLEGE, Pa. (AP) – Penn State says a pair of cyberattacks on its computer systems compromised usernames and passwords but not personally identifiable information or research data.

The university says Friday the attacks on liberal arts college computers were discovered in early May and that evidence showed the earliest sign of intrusion dated to March 2014.

Penn State is asking liberal arts faculty and staff to create new passwords.

The university says there may be minor connectivity disruptions while repairs and upgrades are completed and that the systems should be back to normal by Saturday.

Penn State says it repelled more than 22 million cyberattacks on an average day last year.

It says these attacks were detected through security enhancements put in place after a cyberattack on its engineering college.

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