SANTA MARIA, Brazil — The nightclub Kiss was hot, steamy from the press of beer-fueled bodies dancing close. The Brazilian country band on stage was whipping the young crowd into a frenzy, launching into another fast-paced, accordion-driven tune and lighting flares that spewed silver sparks into the air.

It was another Saturday night in Santa Maria, a university town of about 260,000 on Brazil’s southernmost tip.

Then, in the pre-dawn hours of Sunday, it turned into a scene of indescribable horror as sparks lit a fire in the soundproofing material above the stage, churning out black, toxic smoke as flames raced through the former beer warehouse, killing 231 people.

“I was right there, so even though I was far from the door, at least I realized something was wrong,” said Rodrigo Rizzi, a first-year nursing student who was next to the stage when the fire broke out and watched the tragedy unfold, horror-stricken and helpless.

“Others, who couldn’t see the stage, never had a chance. They never saw it coming.”

The club was hosting a party for university students. Many of the victims were under 20 years old, including some minors.

Brazilian police officials say they’ve made three detentions and are seeking a fourth person in connection with the blaze.