About 30 firefighters responded to a structure fire at an old chicken house next door to the Elm Springs City Hall Wednesday morning.Cave Springs Fire Chief Jordan Gary said the chicken house was fully engulfed when crews got there around 8:30 a.m. Wednesday.He said no one was injured in the fire, and there was no damage to city hall.Cave Springs fire, Springdale fire, Tontitown fire, Lowell fire and Highfill fire crews all responded.The chicken house was on private property near city hall.Gary said crews are still investigating the cause of the fire.