Police have arrested four people in connection with a nightclub fire that killed 231 people in southern Brazil, CNN affiliate BandNews reported.

Two are club owners and the other two members of the band that was performing, it said.

The detainees will be held initially for five days while authorities investigate Sunday's blaze in the Kiss nightclub in Santa Maria, according to Marcos Viana, a police official who spoke with state-run Agencia Brasil. The five-day period can be extended for five more days, the news agency said.

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