At least 27 people died when fire tore through the Rong Beer Na Lat Phrao pub in Bangkok's Chatuchak district late on a Sunday night, according to BBC. More than 70 others were injured, with at least 25 listed in critical condition, per the same report — a toll that had climbed from the initial figures cited by Reuters and Al Jazeera on the day the fire broke out.

Thai police are now investigating possible negligence, according to Reuters and Al Jazeera, with several strands of inquiry running in parallel. An electrical short circuit has been cited as a possible ignition source, per BBC. Separately, Reuters reports that beer crates and tables had blocked fire exits inside the venue, and that police are examining whether doors were locked at the time flames broke out. Investigators are also looking into whether flammable materials were used in the pub's construction or decoration, Reuters adds — a line of inquiry that a Thai Enquirer post published the following day sharpened further, noting that investigators are examining reports of flammable acoustic foam installed across the pub's walls and ceilings.

No official cause has been confirmed. Thai authorities have not yet released a timeline for when findings from the negligence probe, the exit-blockage inquiry, or the materials examination will be consolidated into a single account of how the fire started and why it spread as quickly as it did.

The combination of factors under review — a possible electrical fault, obstructed egress routes, and combustible interior surfacing — follows a pattern familiar from nightclub and entertainment-venue fires elsewhere in the region and beyond. Acoustic foam, often installed cheaply to control noise bleed in bars and live-music venues, ignites readily and can produce dense, toxic smoke far faster than the structural materials around it. When paired with blocked or locked exits, the margin between a contained incident and a mass-casualty event narrows sharply, which is why investigators tend to treat egress obstruction as an aggravating factor independent of whatever initially sparked the blaze.

Thailand's Ministry of Interior and Bangkok Metropolitan Administration have periodically tightened fire-safety codes for entertainment venues after previous incidents, but enforcement has historically been uneven, particularly among smaller pubs and bars operating in mixed-use commercial buildings like those common in Chatuchak. Whether Rong Beer Na Lat Phrao had passed recent safety inspections, and what those inspections covered, has not yet been publicly detailed by Thai authorities.

The scale of casualties — 27 dead, more than 70 hurt, a quarter of the injured in critical condition — places this among the deadlier nightlife-venue fires reported in Southeast Asia in recent years. The final death toll may still shift as hospitals update the status of the critically injured.

What happens next will likely turn on the negligence investigation. If police conclude that exits were deliberately obstructed or locked, or that flammable interior materials were installed in violation of existing code, the case could move toward criminal liability for owners or operators, a pattern seen in comparable fires in other jurisdictions. If instead the short circuit is found to have originated from an unforeseeable electrical fault with no compounding code violations, the response is more likely to center on regulatory tightening than prosecution. The presence of multiple potential contributing factors — ignition source, blocked exits, combustible foam — makes a single, clean causal narrative unlikely, and Thai authorities have given no indication of how long the fuller inquiry will take.