Pyrotechnics to blame for Brazil fire tragedy

A fast-moving fire roared through a crowded, windowless nightclub in southern Brazil, filling the air in seconds with flames and a thick, toxic smoke that killed more than 230 panicked partygoers, many of whom were caught in a stampede to escape.

Inspectors believe the blaze began when a band’s small pyrotechnics show ignited foam sound insulating material on the ceiling, releasing a putrid haze that caused scores of university students to choke to death.