Grenade from the First World War, activated and potentially dangerous. Police found it during an operation against drug trafficking in Montgeron.

The last discovery of a weapon of this type in Essonne dates back to Christmas 2022. In Vigneux-sur-Seine, the police discovered an arsenal (shells, grenades, etc.) in the home of an individual who presented himself as a follower of Nazism. No arrests have taken place at this time; an investigation is underway to identify those who possessed the illicit products.