NEWTOWN TOWNSHIP, Pa. (CBS) — A teacher in Bucks County is accused of having a sexual relationship with an underage student.

Newtown Township Police say Council Rock North High School teacher Jesse Oberto engaged in a sexual relationship with a 16-year-old female student in 2015 and 2016.

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Police learned about the alleged relationship following a child line referral from Bucks County Children and Youth.

Oberto was taken into custody Thursday.

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He has been charged with institutional sexual assault, unlawful contact with a minor and corruption of minors.

Dr. Robert J. Fraser, Superintendent of Schools sent the following letter to parents Thursday afternoon:

Dear Council Rock Parents and Community Members:

It is with great regret that I inform you that a former Council Rock North math teacher, Jesse Oberto, has been arrested on charges he had an inappropriate relationship with a Council Rock student.

Mr. Oberto worked as a teacher for the school district from August, 2003 through September, 2015. The District was not notified of or aware of the alleged relationship between Mr. Oberto and our student until June of this year when the authorities requested the District’s cooperation with the investigation. Council Rock has cooperated fully with local police and will continue to do so. Our students’ safety and welfare is our highest priority and we are shocked and disturbed to learn of these allegations.

All of our employees have current state and federal background checks, including child abuse clearances. We believe that our current policies and procedures are designed to prevent harm to students and to enable swift action when we learn that there has been a violation of law, policy or ethical obligation. If you or your child would like to speak with a counselor about this matter, please contact Dr. Charles Lambert, Director of Special Services, at or 215-944-1062.