CrimeStoppers has a $6,000 reward for anyone who can offer tips to solve recent arson cases in North City.
Those living in the area said the fires really leave them with questions about the motive.
The smell of smoke is still strong at just one of several homes destroyed in a string of fires in the 5100 block of Enright.
Neighbors said flames lit up the skies even damaging the home next door.
"When I looked out my window, I saw all kinds of lights blinking lights in a lot of noise," said Annie Williams, a resident of the area for 40 years.
"It looked like the world was over," another neighbor said.
Not much is left of one home neighbors said was being renovated. Authorities said it was the latest building to burn of three.
Right now, they are investigating fires sparked between October 5th and 7th and another the 11th.