By CBSMiami.com Team

LAKE PLACID (CBSMiami/AP) — A seventh-grader who reportedly threatened to shoot up her middle school on Instagram has been arrested.

The 13-year-old girl’s threats resulted in about 400 students staying home from Lake Placid Middle School on Tuesday, the Highlands County Sheriff’s Office said in a Facebook post.

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She has been charged with a written threat to kill or injure, disturbance of a school function, and using a two-way device to facilitate a felony, Highlands County Sheriff’s officials said.

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The Instagram account where the threat was made has now been deleted.

Investigators are looking into why she made the threat and whether anyone else was involved.

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(© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)

CBSMiami.com Team