Davie police say the Nova High School student wrote a message saying he wanted to see people shake in fear and "blow their heads off."
The teen's arrest report withholds the boy's name and age. It says authorities received a tip of the message written on a chat channel of the Discord app.
News outlets say the boy told police he had no intention of following through with a crime. The student's mother told police she did not have any guns at home.
The boy was arrested on a charge of making a false report concerning the use of firearms in a violent manner.
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