(CNN) - The suspect, who CNN is not naming because of her age, is charged with three counts of aggravated stalking and one count of tampering with a witness, according to a Thursday statement from police.
Many of the texts were allegedly death threats.
According to police, the suspect admitted she sent some of the texts but not all of them.
They said she admitted to sending the following text: "If this isn't bullying then I don't know what is."
The suspect had been friends with the victims, but they had a falling out.
Police detectives interviewed her Monday and told her to steer clear of the victims. She continued to send threatening texts, prompting the tampering with a witness charge, police said.
In a somewhat similar case, police in Florida last month arrested two girls, 14 and 12, in connection with the death of Rebecca Sedwick, who jumped from the top of an abandoned concrete plant. They were charged with felony aggravated stalking.
Sedwick, 12, of Winter Haven, Florida, jumped to her death on September 9.
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