The occupants of a house on the city’s north side escaped unharmed when fire did extensive damage to their home early Sunday afternoon. The Milwaukee Fire Department was called to a house fire at N 11th and W Locust Streets around 1 PM this afternoon. According to officials, the fire was discovered in a first floor bedroom and it extended to the second floor and attic of the wood frame building. The residents were able to escape unharmed and the Red Cross was called in to assist. Milwaukee firefighters battled the blaze for about 90 minutes. The cause of the fire is under investigation.