Nobody was injured Monday afternoon when a student at the Harmony Learning Center fired a school liaison officer’s gun, Maplewood police say.

The officer was sitting on a bench talking with some students about 1:45 p.m., when a third-grader pressed the trigger of the officer’s holstered weapon, according to a news release issued by the Maplewood Police Department.

The gun discharged through the bottom of the holster and a bullet struck the floor, the news release said.

The officer, who was unaware that the child was touching his gun, was wearing a department-approved, Level 3 security holster, the news release said. The holster is equipped with a trigger guard designed to prevent a gun from being fired while in it.

The department is reviewing this holster model and the circumstances surrounding the incident.

A spokesperson for the North St. Paul-Maplewood-Oakdale school district did not immediately return a call seeking comment.

Harmony Learning Center, located at 1961 E. County Road C, serves special education students in grades K-12.