Firefighters returned to the scene of a barn fire south of Edgerton just before midnight Wednesday after the building re-ignited, officials said. Multiple fire department crews had responded at 10:40 a.m. Wednesday to 4649 W. Stone Farm Road and extinguished the flames. The fire re-ignited at 11:57 p.m., and the Edgerton Fire Department asked Janesville and Milton fire departments to send tankers, said a spokeswoman at the Rock County Communications 911 Center. Janesville Fire Department Battalion Chief Scott Running said his department was dispatched at 12:36 a.m. Thursday.