The four killed on a Carnival float on Feb. 12, 2013 were all adults. Children had reportedly been atop the float earlier, but they disembarked shortly before the disaster, according to BBC.
The incident took place in Santos, Brazil during a parade celebrating Carnival, also known as Carnivale or Carnaval, which is a predominantly Catholic tradition that takes place before Lent.
The float belonging to a group called Sangue Jovem (Young Blood) was passing beneath power lines when it made contact with the live wires and burst into flames. Several people were injured in addition to the four killed on the Carnival float. In addition, electrical power serving thousands of people was disrupted after the float caused a short circuit when it collided with the power lines.
After the four were killed on the Carnival float, Mayor of Santos Paulo Alexandre Barbosa halted the festivities, calling the incident "an extreme moment of sadness."