IDAHO FALLS -- Authorities in eastern Idaho say a junior high school student taken into custody after allegedly compiling list of students and police officers he planned to kill and gathering weapons for that purpose had been bullied at school and online.

The boy appeared in juvenile court Wednesday facing a charge of misdemeanor battery stemming from a fight at the school Monday.

His parents called police Monday evening after finding a list the boy made of people police believe he planned to kill. Police found a bag containing guns, ammunition and knives.

Jefferson County Prosecutor Robin Dunn says the boy was reacting to bullying and trying to take matters into his own hands. Police say the bullying led to the Monday fight started by the boy.

Authorities say the boy is undergoing mental health evaluations and treatment.

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