Jan 27 2013, 8:54am CST | by Luigi Lugmayr
A band member performing on stage reportedly lit fireworks that caused the fire.
The fire spread very fast, with the room quickly filling with black smoke.
There was only one exit for the nightclub, which reportedly caused a stampede as the partygoers tried to escape.
Mayor Gerson da Rosa Ferreira said the deaths were caused by asphyxiation or trampling and that 500 people were in the nightclub when the fire broke out.
The nightclub, which can hold 2,000 people at a time, was popular among local youths and college students.
BBC said 15 bodies were found in the club's toilets where people had apparently sought refuge.
A firefighter told BBC he had never seen such a tragedy in his life, with the victims "so young".
A 23-year-old witness, Luana Santos Silva, told Brazil's Globo TV: "We looked up at the ceiling in front of the stage and it was catching fire. My sister grabbed me and dragged me out on the ground."
She said the exit was a "small door for lots of people to come out by".
Her 29-year-old sister, Aline Santos Silva, added: "We managed to see it in time and to get out quickly, before the smoke began to spread."
"The smoke spread really quickly, it didn't give enough time for people to get out. I think people started to feel unwell, and then they began to come out covered in black smoke stains."
Fire chief Guido de Melo said: "People started panicking and ended up treading on each other."
She telephoned Rio Grande do Sul Governor Tarso Genro, offering federal aid for the tragedy at the nightclub.
Luigi is the founding Chief Editor of I4U News and brings over 15 years experience in the technology field to the ever evolving and exciting world of gadgets. He started I4U News back in 2000 and evolved it into vibrant technology magazine.
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