Skeletal remains have been found in a desert area near Interstate 8, the Pinal County Sheriff's Office said.
They said a father and son reported finding the remains Wednesday while searching for meteorites.
A sheriff's deputy accompanied them out to the area near I-8 and milepost 156 and found what appeared to be a skull and rib bones.
The deputy also reported finding scattered remnants of pants and a shirt near the bones.
Authorities said the skeletal remains have been sent to the county Medical Examiner's Office for analysis.
Copyright 2013 Associated Press. All rights reserved. CBS 5 (KPHO Broadcasting Corporation) contributed to this report.