VALPARAISO, Ind . (CBS) — Two students at a northwest Indiana middle school are the subject of a police investigation into nude pictures they allegedly sent to each other.

Valparaiso Police were called Wednesday to Thomas Jefferson Middle School after school officials learned that the students, a boy and girl, both 13, had been texting nude photos of themselves to each other.

Police learned through their investigation that the photos were sent in late March and that both students had the photos stored in their cell phones, a release from police said.

According to the release, the Juvenile Probation Department was contacted and both students were released to guardians. Charges of child exploitation were referred to the Juvenile Probation Department.

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