An Ames man was arrested Wednesday after police say he left threatening and inappropriate messages over the Nevada School District voicemail targeting a transgender student.

Mondell V. Olson, 65, was charged with two counts of first-degree harassment, and one count of third-degree harassment, after leaving two messages threatening to kill, brand, and cause bodily harm to the student.

According to the Nevada Police Department, on Friday, Feb. 10, and Tuesday, Feb. 14, it took reports of several threatening messages, and one that was described as “sexual in nature.”

After conducting an investigation, a search warrant was executed at Olson’s apartment, where police recovered the cell phone involved in the threatening calls and texts.

Nevada police said some of the evidence collected has been shared with the Story County Sheriff’s Office, which is investigating similar reports toward the Nevada student from around the county.

Additional charges may be filed, and police encourage anyone with information to contact either the Nevada Police Department of Story County Sheriff’s Office.

As of Wednesday afternoon, Olson was being held at Story County Jail on $4,300 bond.