Police spokesman Patrick Maierhofer says a lower and middle school were temporarily evacuated today after a 14-year old boy pulled out the grenade from his school bag.
Once at the scene, police and firefighters quickly established that the ordnance was not live and was meant for demonstration purposes.
Police say the boy, an immigrant from Romania, found it there years ago and brought it to school to show it off because his history class was focusing on World War II.