A Newton South teacher who was once a semifinalist for a statewide teacher of the year award was placed on administrative leave this month after a report was made to school officials that he showed a student a photo of a gun in class, the Boston Globe reports.

“While we are unable to share more details of this specific situation, we can tell you that [Deven] Antani will not return to South next year and no longer works for the Newton Public Schools,” Newton Public Schools spokeswoman Julie McDonough said in an e-mail.