Investigators are working to determine what caused a fatal structure fire that killed one person at an apartment building in Sun Prairie Sunday evening.
Dane County Communications told News 3 Now that a call came in around 9:15 p.m. Sunday for a fire inside a building on the 100 block of South Bird Street with victims reportedly trapped.
Sun Prairie Fire Department Assistant Chief Bill Sullivan told News 3 Now crews arrived on the scene within two minutes of the initial call. When crews arrived, heavy fire was visible from a second-story unit located at 205 South Bird Street.
According to a press release, the first crew on the scene searched the lower apartment, where three residents were assisted out from the fire area. One of those residents was transported to a local hospital.