According to police dispatch, at approximately 1:25 a.m., a back porch was on fire on the 1400 block of West Foster Avenue, between Glenwood Avenue and Clark Street.
One source said the fire was at 1450 West Foster Avenue.
A preliminary report indicated the blaze was spreading to a nearby house.
Authorities said at least one person heard an explosion in the area.
If more information becomes available, this article will be updated accordingly.
UPDATE: It appears the fire damaged three buildings and several families were displaced. As of 1:57 a.m., no injuries were reported.