( CNN ) -- Four people were electrocuted when a Carnival float struck power lines in the Brazilian port city of Santos early Tuesday , state broadcaster Agencia Brazil reported . Three men pushing the float were killed instantly , and a 19-year-old spectator who stepped up to help them was also shocked . She died at an emergency room soon afterward , the network reported . The fatalities marred the last day of Carnival , the Catholic tradition that draws millions of Brazilians to the streets for a pre-Lent party . It is the equivalent of Mardi Gras in the French-settled regions of North America .
Four die when a parade float hits a power line . The fatalities mark the final day of the festival .