SANTA MARIA, Brazil // The bodies of the young college students were found piled up just inside the entrance of the Kiss nightclub, among more than 230 people who died in a cloud of toxic smoke after a blaze enveloped the crowded locale within seconds and set off a panic.
Hours later, the horrific chaos had transformed into a scene of tragic order, with row upon row of polished caskets of the dead lined up in the community gymnasium in the university city of Santa Maria. Many of the victims were under 20 years old, including some minors.
As the city in southern Brazil prepared to bury the people killed in the conflagration caused by a band's pyrotechnic display, an early investigation into the tragedy revealed that security guards briefly prevented partygoers from leaving through the sole exit. And the bodies later heaped inside that doorway slowed firefighters trying to get in.
"It was terrible inside - it was like one of those films of the Holocaust, bodies piled atop one another," said police inspector Sandro Meinerz. "We had to use trucks to remove them. It took about six hours to take the bodies away."
Police arrested one of the nightclub's owners of the nightclub as well as two members of the band, a police official said yesterday. An arrest warrant was issued for another owner of the club, said police official Michele Vimmerman. "There were three temporary detentions," Mr Vimmermann said.
Survivors and police inspector Marcelo Arigony, said security guards briefly tried to block people from exiting the club. Brazilian bars routinely make patrons pay their entire tab at the end of the night before they are allowed to leave.
"It was chaotic and it doesn't seem to have been done in bad faith because several security guards also died," he said.
Later, firefighters responding to the blaze initially had trouble entering the club because "there was a barrier of bodies blocking the entrance," Guido Pedroso Melo, commander of the city's fire department, told the O Globo newspaper.
Police inspectors said they think the source of the blaze was a band's small pyrotechnics show. The fire broke out sometime before 3am on Sunday and the fast-moving fire and toxic smoke created by burning foam sound insulation material on the ceiling engulfed the club within seconds.
Authorities said band members who were on the stage when the fire broke out later talked with police and confirmed they used pyrotechnics during their show.
Mr Meinerz, who coordinated the investigation at the nightclub, said one band member died after escaping because he returned inside the burning building to save his accordion. The other band members escaped alive because they were the first to notice the fire.
The fire spread so fast inside the packed club that firefighters and ambulances could do little to stop it, survivor Luana Santos Silva told the Globo TV network.
"There was so much smoke and fire, it was complete panic, and it took a long time for people to get out, there were so many dead," she said.
Most victims died from smoke inhalation rather than burns. Many of the dead, about equally split between young men and women, were also found in the club's two bathrooms, where they fled apparently because the blinding smoke caused them to believe the doors were exits.
There were questions about the club's operating licence. Police said it was in the process of being renewed, but it was not clear if it was illegal for the business to be open. A single entrance area about the size of five door spaces was used both as an entrance and an exit.
Family members of those killed walked around the gym in a daze on Sunday evening, shuffling between caskets or holding one another and weeping as they identified loved ones and tried to make sense of what had happened.
Television images from the city of about 260,000 people showed black smoke billowing out of the nightclub as shirtless young men who attended a university party there joined firefighters using axes and sledgehammers to pound at the hot-pink exterior walls, trying to reach those trapped inside.
Bodies of the dead and injured were strewn in the street and panicked screams filled the air as medics tried to help. There was little to be done; officials said most of those who died were suffocated by smoke within minutes.
Within hours the community gym was a horror scene, with body after body lined up on the floor, partially covered with black plastic as family members identified kin. The gathering at the bar was a party organized by students from several academic departments from the Federal University of Santa Maria. Such organized university parties are common throughout Brazil.
Sunday's fire appeared to be the worst at a nightclub since December 2000, when a welding accident reportedly set off a fire at a club in Luoyang, China, killing 309.