Suggested causes include outdoor fireworks that set the roof on fire, sparklers lighted inside the nightclub,[2] or an electrical explosion.

[citation needed] Video recordings of the indoor stage event, including the countdown to midnight, show that only ordinary holiday sparklers were used.

[citation needed] This strongly suggests the fire originated inside the ceiling space or on the roof, allowing it to grow in intensity while going unnoticed for some time.

[12] It was revealed the club only had one fire extinguisher, and that the nightclub was registered as a food vendor (restaurant), meaning it was required by law to close at midnight.

[9] Prime Minister Abhisit Vejjajiva visited the site and said, "The question is why they let someone take fireworks inside the pub and light them up.

The police blamed the lead singer of "Burn" for setting off fireworks on stage, and the club owner for recklessness and for illegally admitting people under the age of 19.

The Ministry of Justice investigation discovered the nightclub was officially registered as a private residence[13] and therefore had never received a fire safety inspection.

[16] On 25 April 2014, the Southern Bangkok Criminal Court found Setsawat guilty of excise tax violations and sentenced him to one year in prison.