MUNCIE, Ind. (AP) — Police say a Ball State University professor told officers he has been viewing child pornography online for about three years.

The (Muncie) Star Press reports that 68-year-old Robert Yadon was arrested Monday on 10 counts of child exploitation. He was released from the Delaware County jail after posting a $50,000 bond.

A police report says Yadon on June 13 was linked to suspicious activity on a computer in the Ball Communication Building. The police report says officers on June 21 served a search warrant at Yadon’s office and seized devices on which they found several photos depicting sexual conduct by children who appear to be younger than 18.

A statement from Ball State says Yadon was barred from campus as a result of the investigation.

It wasn’t immediately clear if he has an attorney.