Apr 9, 2013 10:45 PM by Robby Messer
TUCSON - More brush fires have Northwest Fire crews responding to Cortaro and the Santa Cruz River.
This is the second time in as many nights fire crews have responded to the area.
Northwest Fire tells News 4 Marana Police is treating tonight's fires as arson and is following up on suspect information.
Part of the ongoing investigation will be to determine if tonight's fires are related to a fire Monday night in the same area.