Authorities say a teenage girl could be facing criminal charges after allegedly giving birth and then leaving the newborn outside an east Mesa home.
Maricopa County Sheriff's Office spokesman Joaquin Enriquez said the baby boy was taken to a hospital with a possible skull fracture.
Deputies were called to the home after 3:15 p.m. Sunday when the 16-year-old girl reported giving birth.
Family members told police that they found the placenta, but couldn't locate the child.
Deputies found the baby in a storage room outside the home, awake and with vital signs.
Authorities say the unidentified mother could have dropped the infant off at a nearby hospital or fire station under Arizona "safe havens" law.
The 2001 law allows anyone to anonymously drop off unharmed infants within 72 hours of their birth.