Authorities are investigating how a Minnesota third-grader managed to discharge a police officer's holstered gun Monday afternoon while participating in a group activity at school, reports ABC News .
The officer was talking with students at the Harmony Learning Center in Maplewood, MN -- about 15 miles east of Minneapolis -- when the student pulled the trigger of the officer’s weapon, ABC affiliate KSTP reported, citing a Maplewood (MN) Police Department news release.