Thailand ? Grieving families prayed for the spirits of their loved ones today while police probed for the cause of a fire that ravaged a Bangkok nightclub, killing about 60 New Year’s Eve partygoers.

Police Maj. Gen. Jongrak Jutanont said investigators were focusing on whether the blaze was sparked by a countdown fireworks display organized by the club owners or by firecrackers brought in by guests.

The fire broke out shortly after the midnight countdown and raced through the jammed two-story club, trapping a number as they tried to flee through one main door.

No charges related to the fire have yet been filed, but the owner, Thai-Chinese businessman Wisuth Setsawat, would be initially charged with allowing underage customers into the Santika Club, Jongrak said. A 17-year-old high school student was found among the dead, he said.