Crosswinds Arts and Science School in Woodbury was locked down this morning after a teacher spotted a threat written on a white board in the school's media center.
The message contained threats against specific students, according to a release from the East Metro Integration District, of which Crosswinds is a member school.
Police responded immediately, investigated the situation and identified a person of interest, according to the release.
Woodbury Sgt. Curt Zacharias said police interviewed students and staff and determined that a 12-year-old female student wrote the threats. Police believe she acted alone, he said, though the investigation is ongoing.
Possible criminal charges could be in line for the girl, though Zacharias couldn't speculate on what she might be charged with. Police found no weapons on the girl, he said.
Police are working with the school and the girls parents, Zacharias said.
After authorities determined there was no further threat to students or staff, the lockdown was lifted, according to the release from EMID. Students returned to their regular school schedules, and parents and families were notified.
"We appreciate the cooperation of students, staff, families, and local authorities in bringing this situation to a safe conclusion," reads the release.
A message left for the school's principal was not immediately returned.