In the US state of Florida, two 14-year-old schoolgirls who planned to kill nine people were detained, CNN reported. 

The girls, who are students of Avon Park High School, were detained on Wednesday, after the teacher discovered a folder containing a plan for future crimes.

“The teacher found the folder and a letter inside that mentioned "guns," the arrest reports said.

Inside were eight pieces of paper, the reports said. They contained written plans to obtain guns, kill nine people and remove and dispose of the bodies,” the source added.

Nine episodes with charges of planning a murder and three kidnapping charges threaten each of the two schoolgirls.

According to a teacher, she saw the two girls acting "hysterical" while they searched for a folder in her classroom.

One of the girls said: "I'm just going to tell them it's a prank if they call me or if they find it."