The gun belonging to a school liaison police officer went off at the Harmony Learning Center in Maplewood on Monday, Maplewood police said in a press release.
The person responsible for firing the gun? A third grade student.
Yes, the alarming incident happened at 1:44 p.m., when the officer was in the gym with third and fourth graders "interacting with them and building relationships," police say.
While talking with students while siting on a bench, a third grader sitting next to him reached over and placed his finger on the officer's gun holster.
He then managed to press the trigger, causing the gun to go off through the bottom of his holster.
The bullet hit the floor and fortunately nobody was injured.
Harmony Learning Center serves special education students in grades K-12.
So how did this happen?
As the police explain, the holster was a "department-approved level 3 security holster, with trigger guard."
Typically, guns can't be touched or fired within these holsters, "but the child's small finger was able to reach inside."
"The Maplewood Police Department is reviewing the circumstances around this incident and the style of holster the officer was wearing to prevent future instances," it said.
You can find more explanation of how Level 3 security holsters work here, courtesy of Police One.