A Maryland teen was taken to the hospital for a medical evaluation Thursday after authorities discovered her plan to carry out a "mass shooting" at her high school.
The Frederick County Sheriff's Office said the teen's father warned officials at Catoctin High School about a "potential threat of violence" against the school.
After conducting an investigation, authorities identified 18-year-old Nichole Cevario of Thurmont, Maryland, as the student plotting an attack.
The sheriff's office said in a press release that their investigation determined "Ms. Cevario posed a threat not only to the school but to herself."
Cevario was taken out of class Thursday and transported to Fredrick Memorial Hospital, where she remains. The sheriff's office said the teen was clearly "struggling with mental health issues."
Detectives recovered a personal journal from Cevario's home, which contained plans for a "shooting event" on April 5.
The sheriff's office said in a press release that it found evidence that the teen was collecting items for the shooting. Those items, according to the release, included a shotgun with ammunition and bomb-making materials that included "pipes with end caps, shrapnel, fireworks, magnesium tape and fuse material."
The journal also included a detailed timeline that outlined how Cevario would go about executing the attack.
Authorities said Cevario planned to die on the day of the shooting but said it was unclear whether she had the "will" to carry out the plan.
The Frederick County Sheriff's Office has a warrant out for Cevario's arrest, which will be served once she is released from the hospital. Cevario faces charges of possession of explosive material with intent to create a destructive device and possession of incendiary material with the intent to create a destructive device.
WJLA contributed to this report.
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