DULUTH, MN (KDAL) - Duluth fire crews responded to a house fire at an up and down duplex at 511 North 57th Avenue West on Saturday night. Smoke and fire was coming from the front exterior and interior wall of the home on both floors. Nobody was injured in the fire but the Red Cross is assisting the occupants of the duplex until repairs are complete. Damage estimates are 25 thousand dollars to the structure and 5 thousand to the contents. The cause of the fire is still undetermined at this time.