Hong Kong Tai Po Hong Fuk Yuen fire investigation points to cigarette butt ignition

An independent investigation committee released a multi‑department final report on the five‑storey Hong Fuk Yuen fire in Tai Po, Hong Kong. The 1,000‑page document concludes the blaze was most likely accidental, sparked by an unextinguished cigarette butt that ignited piles of flammable building materials—paper, foam, cardboard and other debris—on an external platform of the Hong Chang building. Police, the Electrical and Mechanical Services Department and forensic analysts ruled out arson, gas leaks and electrical faults.

The report details how the fire spread rapidly through vertical cavities, the building’s external wall and open windows, aided by a chimney effect and the presence of combustible cladding. A malfunctioning fire alarm delayed evacuation, and foam panels covering windows hindered visibility and contributed to toxic smoke. The blaze caused severe damage to 562 residential units, with over 90% of the most heavily affected units located near the fire‑filled cavity. Photographs and expert testimony presented at hearings support the conclusion that the fire originated outside the units and spread inward.

The findings aim to inform future fire‑safety measures and building‑material regulations in Hong Kong.