Fox News reports the message inside the female restroom read: "I am gonna blow up this school!!!" as well as "Date: 11,5,2022" with a small heart underneath it.
A school resource officer was notified of the message, and the school was checked for any potential threats or devices. None were found.
The girl has been charged with second-degree written threats to kill, injured or conduct act of terrorism, the Haines City Police Department said over the weekend.
"During the course of the investigation, a 13-year-old suspect was identified, and admitted to writing the message because she ‘was bored,’" the police department said.