Madison Consolidated High School and Junior High School remain in a lockout situation today after receiving an external threat Monday.

School resource officers and local law enforcement officers as well as Indiana State Police officers were on the school grounds for several hours Monday, and they will keep a presence at the school today as the investigation into the threat is on-going, according to Jefferson County Sheriff John Wallace.

About 10:50 a.m. yesterday, Madison Consolidated Schools sent the message below to parents and guardians of students:

“We have received an external threat and at this time MCHS and MJHS are under a LOCKOUT situation. No one will be allowed into or out of either building until the situation is resolved. Normal instruction will continue inside of the builidings. MCHS students who are currently on campus at Ivy Tech will be held at Ivy Tech until situation is resolved. We will report additional information as it becomes available. Everyone is safe, we ask that you please allow us to follow our procedures and do not call the buildings.”

In a lockout, classes continue inside the building as scheduled, but no one is allowed to enter the building without going through a screening process. School was dismissed Monday at the regular time and events after school went on as scheduled.

No additional information has been provided today by the Madison school system or the law enforcement agencies.

On Sept. 21, two juveniles — one 15 and the other 17 — were detained in an investigation into a potential threat to Madison Consolidated High School.

The situation began when a student inside the high school received a message on a mobile device and took the message to administrators.

Madison’s high school and junior high both were on lockdown for nearly two hours then after high school administrators received notice of a potential external threat, made by a former student.

“At no time were any Madison students in danger,” said a news release from Madison Schools when the lockdown was over.

Police had the 17-year-old male detained and at the sheriff’s office for questioning by 1:45 p.m., Wallace said at the time. The individual was found in the southwestern part of Jefferson County, not near the Madison schools.

Law enforcement wanted to determine how the “potential rumor, this potential threat started,” said Wallace. The sheriff explained the situation is believed to have begun over allegations about money owed to an individual or money taken from someone.