The athletic director at Roman Catholic High School is under police investigation for alleged inappropriate conduct with a student at another school, the Archdiocese of Philadelphia announced Monday.

Sean Fitzherbert is on administrative leave as the police Special Victims Unit investigates an allegation that surfaced late last week that he had "engaged in inappropriate conduct via computer technology with a minor attending Father Judge High School," said Kenneth A. Gavin, an archdiocese spokesman.

Fitzherbert started work at Roman Catholic in July and had cleared criminal records and child abuse checks, Gavin said. He had not been previously employed with the archdiocese. - Robert Moran