Hawaii football coach Nick Rolovich called out Oregon State on social media for sending recruiting materials to his current players.
According to a post on Twitter, players received materials that included invitations to the Beavers' spring game. The packages were sent to the university.
"My apologies for our players not being able to attend your Spring game," Rolovich wrote. "Ours was the same day, bad timing. Quick question, in the 203 years of coaching, none of you realized you couldn't actively recruit another school's players? Sent to campus?"
My apologies for our players not being able to attend your Spring game. Ours was the same day, bad timing. Quick question, in the 203 years of coaching, none of you realized you couldn't actively recruit another school's players? Sent to campus? #leakydam #sloppybeavers pic.twitter.com/2djcmgFbLH
— Nick Rolovich (@NickRolovich) May 4, 2018
Oregon State issued a statement later Friday and said it is investigating the matter. Under NCAA rules, coaches and programs can't actively recruit players who already have signed a letter of intent with another school.
"Oregon State Athletics and head coach Jonathan Smith became aware of unintentional mailings directed at a University of Hawai'i student-athlete this morning," the school said in its statement. "We are committed to following NCAA rules and are looking into this matter fully."
Three Oregon State assistants -- special teams coordinator Jake Cookus, wide receiver coach Kefense Hynson and defensive line coach Legi Suiaunoa -- were assistants at Hawaii in recent years.
The Associated Press contributed to this report.