Buenos Aires, Aug 20 (DPA) More than four and a half years after a deadly fire in a disco in Argentine city of Buenos Aires, a judge Wednesday sentenced the venue's operator to 20 years in prison.

But family members of the victims expressed outrage that the band performing when the fire broke out had been acquitted.

The catastrophic fire Dec 30, 2004, killed 194 people, most of them young people and injured more than 700 others.

Omar Chaban, who operated the Republica Cromanon disco, was sentenced to 20 years in prison on arson and corruption charges. Other disco employees and officials responsible for overseeing state fire regulations were sentenced to up to 18 years in prison.

But an uproar broke out in the courtroom and in the street outside after the judge cleared musicians from the rock band Callejeros, which set off fireworks during their show causing the blaze.