6,000 Laughing Gas Canisters Seized by Police, Then Stolen Back
Approximately 6,000 nitrous oxide canisters — commonly known as laughing gas — that were seized by Belgian police during a major anti-drug trafficking operation in March have been stolen back from the very hangar where they were confiscated. The extraordinary turn of events occurred because police had no safe storage facility for the highly flammable gas and were forced to leave the haul in the traffickers’ own hangar, secured only by padlocks.
The Seizure
In early 2025, Brussels police launched a large-scale investigation into a nitrous oxide trafficking network operating across Belgium. The operation culminated in coordinated raids on March 12-13, 2026, spanning Halle, Fontaine-l’Évêque, Drogenbos, Charleroi, Saint-Gilles, Brussels, and Anderlecht. Officers seized more than 7,000 canisters of nitrous oxide in various sizes, along with €15,000 in cash, two vehicles, and eight smartphones. Four suspects — two organizers and two suppliers — were arrested.
The street value of the seized canisters was estimated at no less than €300,000, according to reports from DH Les Sports.
A Storage Nightmare
The problem arose immediately after the seizure. Nitrous oxide is highly flammable and pressurized, making it impossible to store at standard court registry facilities due to the risk of explosion. With no suitable alternative available, authorities made the unusual decision to leave approximately 6,000 of the canisters in the traffickers’ own hangar in Halle, a town in Flemish Brabant. The only security measures were new padlocks and seals placed on the hangar door.
“The police therefore had to leave them on site, in the hangar where the seizure had taken place, protected by several padlocks. Padlocks that were broken,” DH Les Sports reported.
The Theft
Around May 19, 2026, the hangar was broken into. All 6,000 canisters were stolen. The Halle-Vilvoorde prosecutor’s office opened an investigation and appointed an investigating judge, but as of late June, no arrests had been made in connection with the theft.
Political Fallout
The incident sparked immediate political controversy. Eva Demesmaeker, the Mayor of Halle and a member of the federal parliament for the N-VA party, publicly expressed fury that she had not been informed about the storage of explosive gas in her city.
“This is beyond absurd. Together with the police, I am responsible for safety on our territory. And then it is truly absurd that as mayor you are not informed,” Demesmaeker told VRT NWS.
The case also highlighted a broader communication breakdown between law enforcement agencies and local authorities.
A Regulatory Vacuum
The incident has exposed a significant gap in Belgium’s regulatory framework. Despite a Royal Decree banning recreational nitrous oxide use in December 2023 — which came into force in April 2024 — there is no national system for handling the seized gas canisters.
Edward Landtsheere, spokesperson for the Federal Public Service Justice, confirmed the problem: “There is currently no national regulation governing their collection and treatment. Practices vary from one district to another,” he told VRT NWS.
The lack of a coordinated approach is compounded by financial barriers. Destroying each canister costs approximately €6, creating a significant disincentive for cash-strapped local authorities. Meanwhile, the illegal use of nitrous oxide remains widespread — Flanders alone recorded a 35% increase in cylinders arriving at recycling parks, with more than 114,800 canisters processed.
Broader Implications
The case raises serious questions about Belgium’s capacity to enforce its drug laws effectively. The canisters that were stolen back are now likely to re-enter the illegal market, potentially funding further criminal activity. The SPF Justice and SPF Public Health are reportedly working on a common framework for the collection, storage, and destruction of seized cylinders, but no concrete timeline has been announced.
What’s Next
As the investigation into the theft continues, the incident serves as a cautionary tale about the gap between legislative intent and enforcement capacity. Without proper storage infrastructure and a national regulatory framework, similar failures may recur. The key question remains: who stole the canisters — and will Belgium’s justice system address the systemic weaknesses that made this farcical chain of events possible?