(CBS) — A teacher resigned Friday amid allegations of “gross misconduct” with a 16-year-old boy at a Southwest Side charter high school.

Chicago Police confirmed Thursday they were investigating the alleged misconduct by a teacher at Horizon Science Academy Southwest Chicago at 5401 S. Western Ave. in the Gage Park neighborhood.

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Police said Friday the investigation is ongoing and no charges have been filed.

“As the allegations involved a minor, the school contacted the [Illinois] Department of Children and Family Services and Chicago Police,” Christopher Murphy, director of strategic growth & PR for Concept Schools, said.

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The school’s administration began an internal investigation on Monday, Murphy said. As a result of that investigation, the teacher, who has worked at the school since 2014, officially resigned Friday.

“DCFS is investigating a case involving a teacher at Horizon Science Academy,” a representative for the agency said. “The investigation is pending.”

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