UPDATE: Madison Central schools no longer on 'perimeter secure' status

MADISON, S.D. (KSFY) - UPDATE 2 PM:

Superintendent Joel Jorgenson says the Madison Central School District is now out of its "Perimeter Secure" status.

He said this comes after a "thorough" investigation with the Lake County Sheriff's Department, the Madison Police Department and the Department of Criminal Investigation into a "concerning" text message.

The message was sent by accident to a Lake County resident who alerted authorities who then alerted school officials, Jorgenson said.

It was discovered that the message did not relate to the school district but pertained to law enforcement activity outside the school, Jorgenson said.

The school remained in "Perimeter Secure" status as a precautionary measure until law enforcement had detained those involved.

"Perimeter secure" status entails all doors into the school are locked, and no one from outside the school is allowed access without an escort. Activities within the school will continue like normal.

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ORIGINAL STORY 9:45 AM:

Schools within the Madison Central School district were placed on an elevated security status Wednesday as a "precautionary measure," according to school officials.

Superintendent Joel Jorgenson sent an email to parents in the district Wednesday morning. It advised parents that schools are going into a "Perimeter Secure" mode.

According to the email, which was obtained by KSFY News, the school district received information from the Lake County Sheriff's Office "of a concerning nature."

Jorgenson, along with Madison Police Chief Justin Meyer and Sheriff Tim Walburg, issued a statement to KSFY News saying authorities are investigating a report of a concerning text message that was received by a Lake County resident.

According to the statement, "There has been no direct threats to the students, staff, or schools however in today’s environment we wanted to ensure the safety of students and staff. The investigation is ongoing and updates will be provided as the situation unfolds."

"Perimeter secure" status entails all doors into the school are locked, and no one from outside the school is allowed access without an escort. Activities within the school will continue like normal.

The Lake County Sheriff's Department, the Madison Police Department, and the South Dakota Division of Criminal Investigation are investigating the matter.

This is a developing news story. Check back for updates.