31 people arrested for selling laughing gas to bars, earning over $4M

Suspects in the laughing gas ring led by Tran Tuan Kiet. Photo by the police

The arrests were conducted on Saturday following a citywide crackdown on banned substances, led by Lieutenant General Mai Hoang, Director of HCMC Police.

Inspections at venues including Public Luxury in Tan Hung Ward, Master SG in Ben Thanh Ward, Snug Pub and Wlounge in Saigon Ward, and CoCo Lounge in Thu Dau Mot Ward uncovered hundreds of customers using laughing gas. Police also seized large quantities of gas cylinders hidden in warehouses.

An expanded investigation identified Tran Tuan Kiet, 30, as the ringleader. Authorities said his group operated from three locations on the city's outskirts, where they stored and refilled N2O (nitrous oxide) cylinders.

Searches turned up 22 tons of gas, more than 1,400 cylinders, 100 kg of balloon shells, decanting equipment and other evidence.

Laughing gas cylinders seized from a ring in Ho Chi Minh City. Photo by the police

Laughing gas, or nitrous oxide, is legally used in dentistry and obstetrics as a light anesthetic. However, when abused recreationally, it becomes a dangerous hallucinogen, especially in high doses or enclosed spaces.

According to investigators, N2O is classified as a banned substance due to its addictive properties and harmful health effects. Despite knowing the risks and legal restrictions, Kiet and his associates continued supplying the gas to nightlife venues to maximize profits.

Police said the group had sold thousands of N2O cylinders since early this year, generating total transactions worth VND253 billion, with profits exceeding VND105 billion.

The case is under further investigation.