From Associated Press:

Brazilian police officials said Monday they’ve made three detentions and are seeking a fourth person in connection with a blaze that ripped through a nightclub in southern Brazil over the weekend, killing more than 230 people.

Inspector Ranolfo Vieira Junior said at a news conference that the detentions are for investigative purposes and those detained can be held up to five days. He declined to identify those detained or the fourth person sought, but the Brazilian newspaper Zero Hora quotes lawyer Jader Marques saying his client Elissandro Spohr, a co-owner of the club, had been held.

The paper also says police detained two band members who were on stage when the blaze broke out and were thought to have used pyrotechnics in their act.

A military brigade official said Monday the death toll now stands at 231 people in the early Sunday blaze in the Kiss nightclub in Santa Maria, a university town of about 260,000 people in southern Brazil. Many of the victims were under 20 years old, including some minors. Most victims died from smoke inhalation rather than burns.

Police have said they think the pyrotechnics ignited sound insulation on the ceiling, while witnesses have reported a fire extinguisher didn’t work and that there was only one working exit. Many of the dead 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.

“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.”

Survivors and another 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,” Arigony told The Associated Press.

Firefighters responding to the blaze initially had trouble getting inside the Kiss nightclub 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.

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.