Bangkok's Rong Beer Na Lat Phrao bar went up in flames late Sunday night, killing 30 people and injuring more than 70.
Authorities are probing possible negligence after survivors reported doors being locked and a lack of emergency exit signage.
Flammable decorations – plastic flowers and foam tiles – helped the fire spread fast from a close‑proximity stage.
Police say the blaze may have been triggered by a short‑circuited air‑conditioner that cut the bar’s power.
Investigators found many victims trapped in the back‑room restrooms, where locked doors halted escape.
Health experts warn that toxic smoke, including carbon monoxide and hydrogen cyanide, could have caused fatal inhalation before burns.
The venue was registered as a “restaurant with live music” and did not use fire‑retardant materials, raising questions about regulatory oversight.
Bangkok Metropolitan Administration said it will review building‑material regulations for entertainment and dining venues.
