Updated

A south-central Idaho charter school says a teacher being investigated amid reports of a student's mouth being taped shut has resigned.

The Times-News reports that Xavier Charter School administrator Gary Moon made the announcement Thursday.

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The instructor's name hasn't been released.

Moon says administrators immediately began an investigation after learning of the allegations in a second-grade class on Feb. 16.

The school says a substitute teacher with a bachelor's degree in education and a current Idaho teaching certificate has been filling in.

The school says that teacher will remain with the class until the end of the school year.