WEBSTER (CBS) – A Webster school bus driver was relieved of duties after a student was left alone on a school bus for an hour and a half earlier this month.

Superintendent of Schools Ruthann Petruno-Goguen said in a letter to parents the October 13 incident was “totally unacceptable and very concerning for the Webster Public Schools because safety of our students is our number one priority.”

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Petruno-Goguen said the student was found safe and returned to the school before being reunited with their parents.

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Webster Police were notified and are investigating the incident.

“The transportation company that we contract with immediately removed the staff involved in this incident,” Petruno-Goguen told parents.

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It is not clear if the driver is still employed by the company.