No credible threat was found after pictures of the 1999 attack and shooting at Columbine High School were posted to the Snapchat page of a Patriot Oaks Academy student, school officials said.
Officials from the St. Johns County School District said the issue was addressed with the student and law enforcement was involved.
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Here is the full text of the message Harrison sent to parents via phone and email:
There was no disruption to the school and no students were in harm's way, a district spokesperson said.
Principal Emily Harrison said in a phone and email message to parents that a parent and students reported the "disturbing message."
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"This morning a parent and students reported a disturbing message posted to a Snapchat story. We worked with law enforcement to fully investigate this matter and determined no credible threat to the school, students or staff at any time. We are operating a normal school day. I appreciate your continued support as we responded to and assessed this situation."