Mares is described as 5 ft, 6 inches tall, 145 lbs, with brown eyes and black and brown hair. Police say she has an olive complexion.
Authorities say Cueto is 5 ft, 7 inches tall, 175 lbs, with brown eyes, black hair and an olive complexion.
According to police, the pair may be driving a black Pontiac Sunfire with Illinois license plate number H717747.
Anyone with information is asked to call the Chicago Police Department at (312)747-8385.