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Two Florida girls brought them to their middle school in an attempt to kill and mutilate fellow students for satanic reasons, officials said Wednesday.

No one was harmed in the foiled plot, which was discovered at Bartow Middle School in central Florida, school officials said.

Police say the girls – ages 11 and 12 – were found in a bathroom stall, allegedly with multiple knives, a pizza cutter and knife sharpener in their possession. The girls planned to commit suicide after stabbing other students, police say.

"The plan was to kill at least 1 student but was hoping to kill anywhere from 15-25 students," an affidavit said. "They would make them worse after they committed suicide …" they would go to hell so they could be with satan. "

The girls allegedly hatched the plot after watching scary movies over the weekend, detectives said. The plan involves lying in wait for smaller students, mutilating their victims 'bodies and drinking their victims' blood, according to authorities.

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After the girls were arrested, investigators found their messages on the plotted attack, WTVT reports. One such message read, "We will leave the body at the entrance and then we will kill ourselves," the station reports, citing police.

Bartow Chief of Police Joe Hall called the plot "horrific" in a statement posted by Polk County Public Schools. Hall went on to say that officials' safety plan helped prevent the alleged attack from occurring.

That plan was triggered as administrators searched for the students after they did not show up for class Tuesday.

The Prosecutor will be in charge of the juveniles or adults, Deputy Chief Chief Bryan Dorman told the Associated Press in an email. Among the charges they face: conspiracy to commit first-degree murder and possession of a weapon at school. The girls were sentenced to a juvenile detention facility.

Contributing: The Associated Press.

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