An update on in the investigation into two fires last week.
Authorities now say that an electrical appliance was the cause of a fire in the 1500 block of Spruce Street.
That fire damaged a house next door.
A man that lived in the house escaped unharmed.
Another fire that started a short time later on North 15th is now being considered arson.
Authorities say that the fire could have been accidental.
Since the house was vacant is could have been a homeless person trying to stay warm or it could have been intentionally set.
Meanwhile, fire investigators say that they are also investigating a fire that damaged a bathroom in Demming Park Thursday morning.