Belgrade Police are investigating a burglary they say led to a handgun being brought to the high school. The school took precautions after rumors that a student was involved in the burglary.
It was only after police had a suspect in custody that they learned a gun was stolen and taken to school.
Officials say this incident developed over two days.
NBC Montana talked with Belgrade School's acting superintendent Mark Halgren. Halgren says it started Wednesday afternoon when a home near the school was burglarized.
According to police, the burglary was not discovered until some time that evening.
On Thursday morning police were still investigating. That is when the administrators learned of possible student involvement and put the high school on alert.
Once police identified and arrested a suspect, that's when they learned the gun had been brought to the high school Wednesday.
Halgren told us they learned other students knew about the gun, but they didn't know until Thursday.
"Of course we learned of it the day after the fact. So in retrospect taken the precautionary measure of going into shelter in place was a positive choice on the school administration's part," explained Halgren.
Police say the suspect is custody.
The district says it is satisfied with the way the situation was handled and feel they took the proper precautions to ensure students were safe. Halgren said they will review disciplinary procedures and the student may face possible expulsion.