In 1999, two teenagers at Columbine High School in Littleton, Colorado, went on a shooting spree, killing 13 people and wounding more than 20 others before turning the guns on themselves.
Coombe did not say if the student was arrested.
“The student made a lapse in judgment in posting a threatening image on social media and will face appropriate consequences,” Coombe said.
Calhoun is about 70 miles northwest of Atlanta.
In October, two students at Etowah High School in Cherokee County were arrested after making threats against students and staff.
Alfred Dupree and Victoria McCurley had access to firearms, but Cherokee County Sheriff Frank Reynolds said they more likely planned to use a flammable device not unlike a bottle-based petrol bomb commonly known as a Molotov cocktail against school staff.
Both 17-year-old juniors will be tried as adults on attempted murder and other charges, the sheriff’s office said.
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