MAPLEWOOD, Minn. (AP) _ Police say a third-grader at a Maplewood school got his finger on the trigger of a liaison officer's holstered gun, causing it to fire a gunshot into the floor.

The police department says no one was injured when the gun discharged Monday afternoon as the officer was talking with students in the gym at Harmony Learning Center. The officer was sitting on a bench when a boy next to him pressed the trigger.

Police say the officer didn't know the boy was touching his gun until it fired.

Authorities say the gun has a trigger guard that typically cannot be touched or fired while in the holster, but the boy was able to reach inside with his small finger.

Maplewood police say they're taking another look at the design of the holster in order to prevent future situations.