Janesville fire officials are investigating the cause of a blaze in a home on the southeast side. Firefighters were called to a one-story ranch home in the 33-hundred block of South River Road about 6:15 p.m. Saturday night. A woman was reportedly trapped and needed help escaping the living room. She was treated for non-life threatening injuries. Firefighters were able to contain the fire to the living room. Officials say nothing’s been found making the fire appear suspicious.