Firefighters were battling an apartment building fire in Chisholm Wednesday night. According to the Northland FireWire, Chisholm and Hibbing firefighters are on scene of a fire on the 400 Block of 6th Street Southwest. The fire was reported shortly after 9 p.m. The Chisholm Police Department says no one was injured. It's unknown if anyone was in the structure at the time of the fire.